Wiper System and Washer System Buick Enclave I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The Body Control Module (BCM) monitors the control circuit of the WIPER relay. The voltage level should be low while the WIPER relay is de-energized and near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage through the WIPER relay control circuit to the coil side of the relay, energizing the WIPER relay.

Conditions for Running the DTC

The BCM output is actively being requested.

Conditions for Setting the DTC

The BCM detects a short to ground in the wiper relay control circuit.

Action Taken When the DTC Sets

The BCM will not activate the output.

Conditions for Clearing the DTC

1. The current DTC will clear when the condition for setting the fault is no longer present.
2. The history DTC will clear after 50 consecutive ignition cycles without a fault present.

Reference Information

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

1. Ignition OFF, disconnect the WPR relay.
2. Connect a test lamp between the control circuit terminal 86 and ground.
3. Ignition ON, command the low speed wipers ON and OFF using the wiper switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, test or replace the WPR relay.

Component Testing

1. Ignition OFF, disconnect the WPR relay.
2. Test for 60-200 ohms between terminals 85 and 86. If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 86 30 and 87 30 and 85 85 and 87 If not the specified value, replace the relay.
4. Test for less than 2 ohms between terminals 30 and 87A. If greater than the specified range, replace the relay.
5. Install a 10A fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than the specified range, replace the relay.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
2. «Relay Replacement (Within an Electrical Center)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions__relay-replacement-within-an-electrical-center) , «Relay Replacement (Attached to Wire Harness)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The Body Control Module (BCM) controls the washer pump motor based on an input from the windshield wiper/washer switch. The BCM monitors the washer switch through the windshield washer switch signal circuit. When the wash switch is closed, ground is supplied to the windshield washer switch signal circuit. When this is seen, the BCM will apply ground to the WSW relay control circuit and command the windshield washer fluid pump and the low speed wipers on.

A washer request is present.

A short to voltage is detected in the windshield WSW relay control circuit.

Washer operation is suspended.

1. A current DTC will clear when the condition for setting the fault is no longer seen.
2. A history DTC will clear after 100 consecutive ignition cycles without a fault present.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition OFF, disconnect the WSW Relay.
2. Connect a test lamp between the control circuit terminal 85 and the B+ terminal circuit 86.
3. Command the washers ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, test or replace the WSW Relay.

1. Ignition OFF, disconnect the WSW Relay.
2. Test for 60-200 ohms between terminals 85 and 86. If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 86 30 and 87 30 and 85 85 and 87 If not the specified value, replace the relay.
4. Test for less than 2 ohms between terminals 30 and 87A. If greater than the specified range, replace the relay.
5. Install a 10A fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than the specified range, replace the WSW relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
2. «Relay Replacement (Within an Electrical Center)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions__relay-replacement-within-an-electrical-center) , «Relay Replacement (Attached to Wire Harness)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.

The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high or low.

A high speed wiper request is present.

A short to voltage is detected in the windshield wiper high speed relay control circuit.

High speed wiper operation is suspended.

1. A current DTC will clear when the condition for setting the fault is no longer seen.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, wiper switch in the HIGH position. Verify the windshield wipers are cycling at the high speed.

1. Ignition OFF, disconnect the WPR HI relay.
2. Connect a test lamp between the control circuit terminal 86 and B+.
3. Ignition ON, command the high speed wipers ON and OFF using the wiper switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
4. If all circuits test normal, test or replace the WPR HI relay.

1. Ignition OFF, disconnect the WPR HI relay.
2. Test for 60-200 ohms between terminals 85 and 86. If the resistance is not within the specified range, replace the relay.
3. Test for infinite resistance between the following terminals: 30 and 86 30 and 87 30 and 85 85 and 87 If not the specified value, replace the relay.
4. Test for less than 2 ohms between terminals 30 and 87A. If greater than the specified range, replace the relay.
5. Install a 10A fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87. If greater than the specified range, replace the relay.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming
2. «Relay Replacement (Within an Electrical Center)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions__relay-replacement-within-an-electrical-center) , «Relay Replacement (Attached to Wire Harness)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.

The ignition is ON.

The BCM detects a short to ground on the windshield wiper switch low signal circuit.

The BCM will only operate the windshield wipers in the high speed mode.

1. A current DTC will clear when the condition for setting the fault is no longer seen.
2. A history DTC will clear after 50 consecutive ignition cycles without a fault present.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Wiper switch in the LO position, verify the scan tool Windshield Wiper Switch parameter is Low.
2. Wiper switch in the HIGH position, verify the scan tool Wiper High Speed Switch parameter is Active
3. Wiper switch in the INT position, verify the scan tool Windshield Wiper Switch parameter is Intermittent.
4. Wiper switch in the INT position, observe the scan tool Wiper Delay Setting parameter while cycling the delay adjustment switch from long delay to short delay. The parameter should cycle between D1 and D5 as each delay position is selected.

1. Ignition OFF, disconnect the X1 harness connector at the multifunction switch.
2. Ignition OFF, test for less than 20 ohms between the low reference circuit terminal 7 and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit test normal, replace the BCM.
3. Ignition ON, verify the scan tool Windshield Wiper Switch parameter is Off. If not the specified value, test the signal circuit terminal 4 (without N38) or terminal 10 (with N38) for a short to ground. If the circuit tests normal, replace the BCM.
4. Install a 3 A fused jumper wire between the signal circuit terminal 4 (without N38) or terminal 10 (with N38) and ground. Verify the scan tool Windshield Wiper Switch parameter is Switch Fault. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, test or replace the multifunction switch.

1. Ignition OFF, disconnect the X1 harness connector at the multifunction switch.
2. With the wiper switch in the HIGH position, test for less than 2 ohms between the low reference terminal 7 and the signal terminal 5 (without N38) or terminal 9 (with N38). If greater than the specified range, replace the windshield wiper washer switch.
3. While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal 7 and the signal terminal 4 (without N38) or terminal 10 (with N38).

Wiper Switch Values

1. If any switch position is not within the specified range, replace the multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Turn Signal Multifunction Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

Symptoms - Wiper/Washer Systems

Note. The following steps must be completed before using the symptom tables: Perform Diagnostic System Check - Vehicle , in order to verify that all of the following conditions are true: No DTCs are set. The control modules can communicate via the serial data link. Refer to the system description and operation in order to familiarize yourself with the system functions: Wiper/Washer System Description and Operation (Wiper and Washers) Rear Wiper/Washer System Description and Operation

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Windshield Wiper/Washer System. Refer to «Checking Aftermarket Accessories»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the washer fluid reservoir for the proper fluid level.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Low Washer Fluid Indicator Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
2. «Rear Wiper System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
3. «Rear Wiper Washer System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
4. «Windshield Wiper Washer System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
5. «Windshield Wiper System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) controls the washer motor based on an input from the windshield washer switch, a part of the multifunction switch. The BCM monitors the washer switch through the windshield washer pump control circuit. When the WASH switch is closed, accessory voltage is supplied to the BCM which will command the windshield washer fluid pump and the low speed wipers On.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, wiper switch in the OFF position, observe the scan tool Windshield Washer Switch parameter while cycling the WASH switch ON and OFF. The parameter should cycle between Active and Inactive. If the parameter does not cycle between the specified values, refer to Windshield Wiper/Washer Switch Circuit Malfunction.
2. Operate the washers using the WASH switch. Verify the washer pump activates and the low speed wipers turn on. If the washer pump does not activate, refer to Washer Pump Circuit Malfunction. If the low speed wipers do not turn on, refer to «Windshield Wiper System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

Windshield Wiper/Washer Switch Circuit Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the multifunction switch.
2. Test for less than 20 ohms between the low reference circuit terminal 7 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool Windshield Washer Switch parameter is Inactive. If not the specified value, test the control circuit terminal 6 (without N38) or terminal 8 (with N38) for a short to B+. If the circuit tests normal, replace the BCM.
4. Install a 3 A fused jumper wire between the control circuit terminal 6 (without N38) or terminal 8 (with N38) and B+. Verify the scan tool Windshield Washer Switch parameter is Active. If not the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
5. If all circuits test normal, test or replace the multifunction switch.

Washer Pump Circuit Malfunction

1. Ignition OFF, Disconnect harness connector at Windshield Washer Fluid Pump.
2. Ignition ON, test for B+ at control circuit terminal A of Windshield Washer Fluid Pump connector while activating washers. If not the specified value, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
3. Install a test light between control circuit terminal A and ground circuit terminal B at the windshield washer fluid pump connector
4. The test lamp should turn ON and OFF when the windshield washers are commanded ON and OFF. If not the specified value, test the ground circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.

Multifunction Switch

1. With the WASH switch in the open position, test for infinite resistance between the Accessory Voltage terminal 7 and the control terminal 6 (without N38) or terminal 8 (with N38). If not the specified value, replace the multifunction switch.
2. With the WASH switch in the closed position, test for less than 2 ohms between the Accessory Voltage terminal 7 and the control terminal 6 (without N38) or terminal 8 (with N38). If greater than the specified range, replace the multifunction switch.

Washer Pump

1. Ignition OFF, disconnect the harness connector at the washer pump.
2. Install a 10 A fused jumper wire between the control terminal A and 12 V. Install a jumper wire between the ground terminal B and ground.
3. Verify the washer pump is activated. If the washer pump does not activate , replace the washer pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Turn Signal Multifunction Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
2. «Washer Pump Replacement»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
3. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The body control module (BCM) controls the wiper motor based on input from the windshield wiper washer switch. The BCM monitors the wiper washer switch through three separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.

The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high or low.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, wiper switch in the OFF position, verify the scan tool Windshield Washer Switch parameter is Inactive. If not the specified value, refer to «Windshield Wiper Washer System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Wiper switch in the OFF position, verify the scan tool Windshield Wiper Switch parameter is Off. If not the specified value, refer to Multifunction Switch Circuit Malfunction.
3. Wiper switch in the OFF position, verify the scan tool Wiper High Speed Switch parameter is Inactive. If not the specified value, refer to Multifunction Switch Circuit Malfunction.
4. Wiper switch in the LO position, verify the scan tool Windshield Wiper Switch parameter is Low. If not the specified value, refer to Multifunction Switch Circuit Malfunction.
5. Wiper switch in the HIGH position, verify the scan tool Wiper High Speed Switch parameter is Active If not the specified value, refer to Multifunction Switch Circuit Malfunction.
6. Wiper switch in the INT position, verify the scan tool Windshield Wiper Switch parameter is Intermittent. If not the specified value, test or replace the multifunction switch.
7. Wiper switch in the INT position, observe the scan tool Wiper Delay Setting parameter while cycling the delay adjustment switch from long delay to short delay. The parameter should cycle between D1 and D5 as each delay position is selected. If not the specified value, test or replace the multifunction switch.
8. Wiper switch in the LO position, verify the windshield wipers are cycling at the low speed. If the wipers are not operating at the low speed, refer to Windshield Wiper Motor Circuit Malfunction.
9. Wiper switch in the HIGH position, verify the windshield wipers are cycling at the high speed. If the wipers are not operating at the low speed, refer to Windshield Wiper Motor Circuit Malfunction.
10. Wiper switch in the INT position, cycling the delay adjustment switch from long delay to short delay. Verify the wiper delay time decreases from long delay to short delay as each delay position is selected. If the delay does not change as specified, refer to Windshield Wiper Motor Circuit Malfunction.

Multifunction Switch Circuit Malfunction

1. Ignition OFF, disconnect the X1 harness connector at the multifunction switch.
2. Ignition OFF, test for less than 20 ohms between the ground circuit terminal 7 and ground. If greater than the specified range, test the ground circuit for an open/high resistance. If the circuit test normal, replace the BCM.
3. Ignition ON, verify the scan tool Windshield Wiper Switch parameter is Off. If not the specified value, test the signal circuit terminal 4 (without N38) or terminal 10 (with N38) for a short to ground. If the circuit tests normal, replace the BCM.
4. Verify the scan tool Wiper High Speed Switch parameter Inactive. If not the specified value, test the signal circuit terminal 5 (without N38) or terminal 9 (with N38) for a short to ground. If the circuit tests normal, replace the BCM.
5. Install a 3 A fused jumper wire between the signal circuit terminal 4 (without N38) or terminal 10 (with N38) and ground. Verify the scan tool Windshield Wiper Switch parameter is Switch Fault. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
6. Install a 3 A fused jumper wire between the signal circuit terminal 5 (without N38) or terminal 9 (with N38) and ground. Verify the scan tool Wiper High Speed Switch parameter is Active. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
7. If all circuits test normal, test or replace the multifunction switch.

Windshield Wiper Motor Circuit Malfunction

1. Ignition OFF, disconnect windshield wiper relay.
2. Test for less than 20 ohms between the ground circuit terminal 85 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Test for less than 20 ohms between the ground circuit terminal 87A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 87 and ground. If the test lamp does not illuminate, test or replace the underhood fuse block.
5. Install a test lamp between the control circuit terminal 86 and the ground circuit terminal 85.
6. Using the multifunction switch, command the low speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
7. Ignition OFF, disconnect the windshield wiper speed control relay.
8. Test for less than 2 ohms between the control circuit terminal 30 at the windshield wiper relay and the control circuit terminal 30 at the windshield wiper speed control relay. If greater than the specified range, replace the underhood fuse block.
9. Connect the windshield wiper relay.
10. Test for less than 20 ohms between the control circuit terminal 30 and ground. If greater than the specified range, test or replace the windshield wiper relay.
11. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 85 and ground. If the test lamp does not illuminate, test or replace the underhood fuse block.
12. Install a test lamp between the control circuit terminal 30 and ground.
13. Using the multifunction switch, command the low speed wipers ON. The test lamp should turn illuminate. If the test lamp does not illuminate, replace the windshield wiper relay.
14. Install a test lamp between the B+ circuit terminal and the control circuit terminal 86.
15. Using the multifunction switch, command the high speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded. If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
16. Ignition OFF, connect the windshield wiper speed control replay. Disconnect the harness connector at the windshield wiper motor.
17. Test for less than 20 ohms between the ground circuit terminal 4 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
18. Connect a test lamp between the control circuit terminal 2 and ground.
19. Using the multifunction switch, command the low speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the windshield wiper speed control relay. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the windshield wiper speed control relay.
20. Connect a test lamp between the control circuit terminal 1 and ground.
21. Using the multifunction switch, command the high speed wipers ON and OFF. The test lamp should turn ON and OFF as commanded. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, test or replace the windshield wiper speed control relay. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the windshield wiper speed control relay.
22. Wipers OFF, verify a test lamp illuminates between the signal circuit terminal 3 and ground. If the test lamp does not illuminate, test the signal circuit for a short to ground or an open high resistance. If the circuit tests normal, replace the BCM.
23. If all circuits test normal, test or replace the windshield wiper motor.

Multifunction Switch

1. Disconnect the X1 harness connector at the multifunction switch.
2. With the wiper switch in the HIGH position, test for less than 2 ohms between the low reference terminal 7 and the signal terminal 5 (without N38) or terminal 9 (with N38). If greater than the specified range, replace the windshield wiper washer switch.
3. While cycling the wiper switch through each delay and speed position, test for the specified resistance between the low reference terminal 7 and the signal terminal 4 (without N38) or terminal 10 (with N38).

Note. If the switch tests open in any switch position other than Off, test the signal circuits for a short to voltage before replacing the switch.

Wiper Switch Values

1. If any switch position is not within the specified range, replace the windshield wiper washer switch.

Windshield Wiper Motor

1. Ignition OFF, disconnect the harness connector at the windshield wiper motor.
2. Install a 25 A fused jumper wire between the control terminal 2 and 12 volts. Install a jumper wire between the ground terminal 4 and ground.
3. Verify the wiper motor is operating in the low speed mode. If the wiper motor is not in the low speed mode, replace the windshield wiper motor.
4. Install a 25 A fused jumper wire between the control terminal 1 and 12 volts. Install a jumper wire between the ground terminal 4 and ground.
5. Verify the wiper motor is operating in the high speed mode. If the wiper motor is not in the high speed mode, replace the windshield wiper motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure

1. «Turn Signal Multifunction Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
2. «Windshield Wiper Motor Replacement»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
3. «Underhood Electrical Center or Junction Block Replacement»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
4. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The instrument panel cluster (IPC) monitors the washer fluid level sensor via the washer fluid level sensor signal circuit. With the switch closed, the signal circuit is pulled to ground indicating low fluid level. When low fluid level is indicated, the IPC will illuminate the low washer fluid indicator.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Wiper/Washer System Description and Operation (Wiper and Washers)

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Verify the windshield washer fluid level is above the minimum level. If not above the minimum level, fill the reservoir and inspect for leaks.
2. Verify the scan tool IPC Washer Fluid Level parameter is OK.

1. Ignition OFF, disconnect the harness connector at the washer fluid level sensor.
2. Test for less than 1 ohm between the ground circuit terminal 1 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify the scan tool IPC Washer Fluid Level parameter is OK. If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the IPC.
4. Install a 3A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1. Verify the scan tool IPC Washer Fluid Level parameter is Low. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.
5. If all the circuits test normal, test or replace the washer fluid level sensor.

1. Ignition OFF, disconnect the harness connector at the washer fluid level sensor.
2. Washer fluid level switch open, test for infinite resistance between the signal terminal 2 and the ground terminal 1. If not the specified value, replace the washer fluid level sensor.
3. Washer fluid level switch closed, test for less than 2 ohms between the signal terminal 2 and the ground terminal 1. If not within the specified range, replace the washer fluid level sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Windshield Washer Solvent Level Switch Replacement»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for IPC replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The rear wiper is controlled based on an input from the rear wiper/washer switch. When closed, the wiper ON switch provides a voltage signal to the rear window wiper motor indicating rear wiper operation is requested. The rear wiper motor receives B+ voltage from the I/P fuse block and accessory voltage from the body control module (BCM).

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Rear Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Command the rear wiper ON using the rear wiper switch. The rear wiper should activate.

1. Ignition OFF, disconnect the harness connector at the multifunction switch - I/P.
2. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 6 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to «Power Mode Mismatch»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) .
3. Ignition OFF, connect the harness connector at the multifunction switch - I/P. Disconnect the harness connector at the rear window wiper motor.
4. Test for less than 20 ohms between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
5. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
6. Verify a test lamp illuminates between the ignition circuit terminal E and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
7. Rear wiper switch in the ON position, verify a test lamp illuminates between the signal circuit terminal D and ground. If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the I/P switch assembly.
8. If all circuits test normal, test or replace the rear window wiper motor.

I/P Switch Assembly

1. Ignition OFF, disconnect the harness connector at the multifunction switch - I/P.
2. Rear wiper switch in the OFF position, test for infinite resistance between the ignition terminal 6 and the signal terminal 5. If not the specified value, replace the I/P switch assembly.
3. Rear wiper switch in the ON position, test for less than 5 ohms between the ignition terminal 6 and the signal terminal 5. If not within the specified range, replace the I/P switch assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Accessory Switch Replacement»(/buick/enclave/i-2007-2013/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
2. «Rear Window Wiper Motor Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Rear Window Wiper Motor Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Rear Window Wiper Motor Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
3. «Turn Signal Multifunction Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category

The rear washer is activated based on an input from the rear washer switch. When the wiper portion of the rear wiper/washer switch is closed, B+ is applied to the REAR/WSW relay indicating rear washer operation is requested. With B+ applied to the relay coil, the relay is energized and B+ is supplied to the washer pump.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Rear Wiper/Washer System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the rear wiper operates normally using the rear wiper switch. If the rear wipers do not operate properly, refer to «Rear Wiper System Malfunction»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Operate the rear washers using the rear washer switch. The rear washer pump should activate.

1. Ignition OFF, disconnect the REAR/WSW relay.
2. Ignition ON, verify a test lamp does not illuminate between the control circuit terminal 87 and ground. If the test lamp illuminates, test the control circuit for a short to voltage.
3. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 86 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 30 and ground. If the test lamp does not illuminate, replace the I/P fuse block.
5. Install a test lamp between the control circuit terminal 85 and ground.
6. Command the rear washers ON and OFF using the rear washer switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the I/P switch assembly. If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the I/P switch assembly.
7. Ignition OFF, disconnect the harness connector at the rear window washer fluid pump.
8. Test for less than 20 ohms between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
9. Connect the harness connector at the rear window washer fluid pump.
10. Connect a 20 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87. Verify the rear window washer fluid pump is activated. If the rear window washer fluid pump does not activate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the rear window washer fluid pump.
11. Disconnect the harness connector at the rear window wiper motor.
12. Rear wiper switch in the ON position, verify a test lamp illuminates between the signal circuit terminal C and ground. If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the I/P switch assembly.
13. If all circuits test normal, test or replace the REAR/WSW relay.

I/P Switch Assembly

1. Ignition OFF, disconnect the harness connector at the I/P switch assembly.
2. Rear washer switch OFF, test for infinite resistance between the ignition terminal 6 and the control terminal 12. If not the specified value, replace the I/P switch assembly.
3. Rear washer switch ON, test for less than 2 ohms between the ignition terminal 6 and the control terminal 12. If greater than the specified range, replace the I/P switch assembly.

Rear Window Washer Fluid Pump

1. Ignition OFF, disconnect the harness connector at the rear window washer fluid pump.
2. Install a 20 A fused jumper wire between the control terminal B and 12 V. Install a jumper wire between the ground terminal A and ground.
3. Verify the rear window washer fluid pump is activated. If the rear window washer fluid pump does not activate, replace the rear window washer fluid pump.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Rear Window Washer Pump Replacement (Acadia and Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system)
2. «Turn Signal Multifunction Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
3. «Instrument Panel Electrical Center or Junction Block Replacement»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)
4. «Accessory Switch Replacement»(/buick/enclave/i-2007-2013/remont/gauges-instrument-panels/#instrument-panel-system-displays-and-gauges)
5. «Relay Replacement (Within an Electrical Center)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions__relay-replacement-within-an-electrical-center) , «Relay Replacement (Attached to Wire Harness)»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)

Wiper Arm Pressure Check

1. Run the wiper arms to the mid-wipe position.
2. Remove the wiper blades from the wiper arms. Refer to «Windshield Wiper Blade Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
3. Attach a scale to the end of the wiper arm and measure the force required to lift the wiper arm perpendicular to the windshield to normal working height (height with the blade attached).
4. Replace the wiper arm if the measurement is not within the specification. Refer to «Windshield Wiper Arm Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Arm Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system__windshield-wiper-arm-replacement-acadia) , «Windshield Wiper Arm Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) . Tip Pressure Driver side, 9.6-11.8 Newtons (35-42 oz) Passenger side, 7.4-9.2 Newtons (27-33 oz)
5. Install the wiper blades on the wiper arms. Refer to «Windshield Wiper Blade Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

Wiper Blade Element Check

1. Remove the wiper blades from the wiper arms. Refer to «Windshield Wiper Blade Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Look down the length of the blade element.
3. Replace the wiper blade element if the rubber element which contacts the glass is not on the centerline of the blade +/-15 degrees.
4. Install the wiper blades on the wiper arms. Refer to «Windshield Wiper Blade Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) , «Windshield Wiper Blade Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

Scheme 4

Windshield Washer Nozzle Replacement (Acadia, Enclave)

Scheme 5

Windshield Washer Nozzle Replacement (Traverse)

Scheme 6

Rear Window Washer Nozzle Replacement (Acadia)

Scheme 7

Rear Window Washer Nozzle Replacement (Enclave)

Scheme 8

Rear Window Washer Nozzle Replacement (Traverse)

Scheme 9

Windshield Washer Hose Replacement (Acadia)

Scheme 10

Windshield Washer Hose Replacement (Enclave)

Scheme 11

Windshield Washer Solvent Container Replacement (Acadia and Enclave)

Scheme 12

Washer Pump Replacement

Scheme 13

Rear Window Washer Pump Replacement (Acadia and Enclave)

Scheme 14

Windshield Washer Solvent Level Switch Replacement

Scheme 15

Windshield Washer Solvent Heater Replacement (Traverse)

Scheme 16

Windshield Washer Solvent Heater Replacement (Acadia and Enclave)

Scheme 17

Air Inlet Grille Panel Replacement

Scheme 18

Windshield Wiper Arm Replacement (Traverse)

Windshield Wiper Arm Replacement (Acadia)

Windshield Wiper Arm Replacement (Acadia)

Scheme 19

Windshield Wiper Arm Replacement (Enclave)

Scheme 20

Rear Window Wiper Arm Replacement (Acadia)

Scheme 21

Rear Window Wiper Arm Replacement (Traverse)

Scheme 22

Rear Window Wiper Arm Replacement (Enclave)

Scheme 23

Windshield Wiper Blade Replacement (Acadia)

Scheme 24

Windshield Wiper Blade Replacement (Enclave)

Scheme 25

Windshield Wiper Blade Replacement (Traverse)

Scheme 26

Rear Window Wiper Blade Replacement (GMC Acadia)

Scheme 27

Rear Window Wiper Blade Replacement (Traverse)

Scheme 28

Windshield Wiper Motor Replacement

Scheme 29

Rear Window Wiper Motor Replacement (Traverse)

Scheme 30

Rear Window Wiper Motor Replacement (Acadia)

Scheme 31

Rear Window Wiper Motor Replacement (Enclave)

Scheme 32

Windshield Wiper Transmission Replacement

Windshield Glass Cleaning

Clean the windshield with windshield cleaner, or equivalent. The cleaner should not harm the paint finish or scratch the glass. The glass is clean when the water no longer beads, but sheets across the entire glass surface.

Wiper Blade Element Cleaning

Lift each blade assembly off of the windshield and clean the element with a cloth saturated with full strength washer solvent. Then rinse the blade assemblies with clear water.

Wiper Chatter Repair

Some vehicles may exhibit a condition where the windshield wipers chatter and/or wipe unevenly. Several items may contribute to this condition. To completely repair this condition, ALL of the items listed should be tested and repaired as necessary.

1. Clean the windshield glass.
2. Clean the wiper blade elements.
3. Perform the wiper arm pressure test.
4. Inspect the wiper blade element set.

Rear Wiper Operation

The rear wiper is controlled by an input from the rear wiper/washer switch which is located in the center console switch bank. The rear wiper/washer switch is a three position switch, when the WIPER protion of the switch is pushed into it's detent the rear wipers are turned on, a voltage signal from the BCM is applied through the wiper washer switch to the rear wiper motor to command it ON. With the switch in the center or rest position the wipers are OFF.

Rear Washer Operation

When the WASHER portion of the switch is pressed the rear washers are turned on, the switch has a momentary contact in the washer position and will continue to spray as long as the switch is being pressed and will stop when it is released. When the wiper portion of the rear wiper/washer switch is closed, B+ is applied to the REAR/WSW relay indicating rear washer operation is requested. With B+ applied to the relay coil, the relay is energized and B+ is supplied to the washer pump.

Wiper/Washer System Components

The Wiper/Washer System consists of the following components

1. Windshield wiper/washer switch
2. Body control module (BCM)
3. WPR Relay
4. WPR HI Relay
5. Windshield wiper motor
6. Windshield washer fluid pump
7. Windshield washer fluid level switch
8. Rain sensor module
9. Instrument panel cluster (IPC)
10. WPR Fuse 25 A
11. WSW/PUMP Fuse 10 A
12. RAP Fuse 10 A

Refer to Master Electrical Component List .

Power and Grounds

With the ignition in the ON position, accessory voltage is supplied through the 25A WPR fuse to the WIPER relay, the WIPER HI relay and the WSH relay that are all located in the underhood fuse block. Refer to Wiper/Washer Schematics .

G101 provides ground for the windshield wiper motor. G104 provides ground for the WPR relay, the WPR HI relay, the windshield washer fluid pump and the windshield washer fluid level switch.

Modes of Operation

The normal wiper system function positions are as follows

1. MIST
2. DELAY
3. MANUAL LOW
4. MANUAL HIGH
5. WASH

Automatic Modes of Operation

1. AUTOMATIC DELAY
2. AUTOMATIC LOW
3. AUTOMATIC HIGH

Automatic low speed and automatic high speed wiper modes are continuous wiper operations that are controlled by the outside moisture sensor. Automatic low and high speed operation is utilized when the amount of precipitation on the windshield exceeds the automatic delay or low threshold.

Moisture Sensitive Wipers

The outside moisture sensor monitors moisture accumulation on the windshield and uses a windshield wiper/washer switch status input to provide wipe commands to the body control module (BCM). The DELAY positions on the wiper/washer switch are used to activate the AUTOMATIC rain sensing operating mode. They are also used to adjust the level of sensitivity to moisture accumulation, which determines the dwell time for commanding a wiper motor wipe cycle.

Accessory voltage is supplied to the outside moisture sensor through the 10A RAP Fuse, located in the rear fuse block. The sensor is grounded through the ground circuit and G402. Whenever the ignition is in the run or accessory positions, the BCM sends the wiper/washer switch status using a pulse width modulation (PWM) signal through the outside moisture sensor signal 1 circuit to the outside moisture sensor. When a wipe cycle is needed, the moisture sensor sends a PWM voltage signal through the moisture sensor signal 2 circuit back to the BCM requesting the wiper operation.

The outside moisture sensor uses the moisture sensor signal 2 circuit to command wiper motor wipe cycles and to confirm the moisture sensor signal 1 is being received. If at anytime communication between the outside moisture sensor and BCM is lost, the BCM will use the inputs from the windshield wiper/washer switch in the delay positions to operate the wiper motor at continuous variable delay intervals.

Low Speed Operation

When the wiper switch is in the low speed position, ground is applied through a resistor internal to the switch and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WPR relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WPR relay and out to the switch input side of the WPR HI relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.

Wiper motor low speed operation and the WPR relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References .

Mist Operation

Windshield wiper/washer system MIST operation is identical to wiper Low operation, except that the mist switch is a press and release type switch. When the wiper switch is moved to the mist position and released, low speed wiper motor operation is started and will continue until 1 wipe cycle is complete. If the wiper switch is moved to the mist position and held, the wiper motor will operate in the low mode until the switch is released.

Delay Operation

Windshield wiper delay operation is a low speed wiper motor function with a variable delay interval between the wiper motor cycles. The delay interval is determined by a series of 6 resistors within the wiper/washer switch. The body control module (BCM) monitors the wiper switch low signal circuit to determine the delay interval between the low speed wiper motor wipe cycles.

High Speed Operation

When the wiper switch is in the high speed position, ground is applied through the windshield wiper switch high signal circuit to the body control module (BCM) indicating the wiper high speed request. In response to this signal, the BCM then energizes the WPR relay, as stated above, and the WPR HI relay by applying ground through the control circuit to the coil side of the relay. With the wiper high relay energized and its switch contacts closed to the high speed control circuit of the wiper motor, the motor will operate at high speed.

The wiper high speed relay can also be commanded ON/OFF by using a scan tool. However, before commanding the wiper motor high speed mode ON/OFF using a scan tool, the WPR relay must be energized by placing the wiper switch in the low speed position. Refer to Control Module References .

Wash Operation

When the windshield Wash switch is pressed, ground is applied through the switch contacts and the windshield washer switch signal circuit to the body control module (BCM) indicating the windshield wash request. The BCM then energizes the WPR relay, as stated above, and the WSH relay by applying ground through the control circuit to the coil side of the relay. With the wash relay energized, battery voltage from the WPR fuse is applied through the switch side of the relay and out to the control circuit of the windshield washer fluid pump. The wiper motor will operate for 2 wipe cycles after the wash switch is released.

The WSH relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References .

Park Position Operation

Windshield wiper motor park operation is controlled by the body control module (BCM) using an input from the park switch that is located within the wiper motor assembly. The BCM monitors the windshield wiper motor park switch signal circuit, to determine if the windshield wiper blades are at the bottom of the glass. During wiper operation, each time the wiper blades are at the bottom of the glass, the park switch is momentarily closed to ground signaling the BCM the wiper position. When the wiper switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the BCM will continue to operate the motor until the wipers reach the park position. If the ignition is turned OFF while the wipers are in mid-cycle, the wipers will stop immediately where they are. The BCM will park the wipers the next time the ignition is turned ON.

Washer Fluid LOW ADD FLUID Message

The WASHER FLUID LOW ADD FLUID message is controlled by the instrument panel cluster (IPC) using an input from the washer fluid level switch. With the ignition in the ON position, the IPC applies ignition voltage through an internal resistor and the windshield washer fluid level signal circuit to the windshield washer fluid level switch. The IPC then monitors this voltage to determine the washer fluid level. With the washer fluid above a determined level, the washer fluid level switch is open and the IPC detects voltage on the signal circuit. When the washer fluid reaches the point where the driver should be informed that the washer fluid is low, the washer fluid level switch closes. When the washer fluid level switch is closed, the washer fluid level signal circuit is pulled low and the IPC displays the WASHER FLUID LOW ADD FLUID message on the driver information center (DIC). In order to prevent the WASHER FLUID LOW ADD FLUID message from being displayed while sloshing is occurring in the washer fluid container, the IPC is programed with a 1 minute delay before changing states of the WASHER FLUID LOW ADD FLUID message during an ignition cycle.

Special Tools

Illustration Tool Number/ Description J 39232 Wiper Linkage Separator J 39529 Wiper Linkage Installer

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Relay Replacement (Within an Electrical Center)
• Relay Replacement (Attached to Wire Harness)
• Turn Signal Multifunction Switch Replacement
• Checking Aftermarket Accessories
• Power Mode Mismatch
• Accessory Switch Replacement
• Hood Insulator Replacement (Acadia and Enclave)
• Rear Spoiler Replacement (Enclave, Traverse)
• Front Wheelhouse Front Liner Replacement (Enclave - Acadia)
• Air Cleaner Assembly Replacement
• Fastener Caution
• Liftgate Trim Panel Replacement (Traverse)
• Liftgate Trim Panel Replacement (Acadia)
• Master Electrical Component List
• DTC B3715
• Windshield Wiper Arm Replacement (Acadia)
• Wiper Blade Element Check