Wiper System and Washer System Cadillac STS I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Wiper/Washer System Connector End Views

Headlamp Washer Fluid Pump Relay Connector End (CE4) Connector Part Information OEM: 12110539 Service: 15306045 5-Way F Metri-Pack 280 Series, Flexlock (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function 30 PU 1197 Headlamp Washer Pump Control 85 YE 243 Accessory Voltage 86 WH 2282 Headlamp Washer Relay Control 87 RD/BK 4042 Battery Positive Voltage 87A - - Not Used

Headlamp Washer Pump Connector End (CE4) Connector Part Information OEM: 12052613 Service: 12085212 2-Way F Metri-Pack 480 Series, Sealed (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A BK 150 Ground B PU 1197 Headlamp Washer Pump Control

Heated Washer Nozzle - Left Connector End (XA7) Connector Part Information OEM: 12047663 Service: 12085481 2-Way M Metri-Pack 150 Series (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A PK 1439 Run/Crank Ignition 1 Voltage B BK 150 Ground

Heated Washer Nozzle - Right Connector End (XA7) Connector Part Information OEM: 12047663 Service: 12085481 2-Way M Metri-Pack 150 Series (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A PK 1439 Run/Crank Ignition 1 Voltage B BK 150 Ground

Outside Moisture Sensor Connector End (w/CE1) Connector Part Information OEM: 15324252 Service: 4-Way F Micro-Pack 100 Series (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function 1 L-GN 482 Rain Sense Signal (2) 2 TN 481 Rain Sense Signal (1) 3 BK 850 Ground 4 YE 243 Accessory Voltage

Windshield Washer Pump Connector End Connector Part Information OEM: 12052641 Service: 12102747 2-Way F Metri-Pack 150 Series (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A OG 228 Windshield Washer Pump Control B BK 150 Ground

Windshield Washer Fluid Level Switch Connector End Connector Part Information OEM: 12162195 Service: 88987183 2-Way F Metri-Pack 150.2 Series, Sealed, Pull To Seat (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A BK 150 Ground B TN/WH 99 Windshield Washer Fluid Level Sensor Signal

Windshield Wiper/Washer Module Connector End Connector Part Information OEM: 12176335 Service: 15305944 8-Way F Metri-Pack 280 Series (NA) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function A TN 481 Rain Sense Signal (1) B GY 478 Windshield Wiper Switch Signal (2) C D-BU 477 Windshield Wiper Switch Signal (1) D BK 150 Ground E YE 143 Accessory Voltage F OG 228 Windshield Washer Pump Control G PU 92 Windshield Wiper Motor High Speed Control H L-GN 482 Rain Sense Signal (2)

Windshield Wiper/Washer Switch Assembly Connector End Connector Part Information OEM: 15339096 Service: 7-Way F 150 Series (BK) Terminal Part Information Terminal: Terminal Seal: Release Tool: Core Crimp: Insulation Crimp: Test Probe: Pin Wire Color Circuit No. Function G - - Not Used H D-BU 477 Windshield Wiper Switch Signal (1) K PU 92 Windshield Wiper Motor High Speed Control L WH 1538 Headlamp On With Wipers Signal M YE 43 Accessory Voltage N GY 478 Windshield Wiper Switch Signal (2)

Diagnostic Starting Point - Wiper/Washer Systems

Before you begin any diagnostic procedure, always review the system Description and Operation. Reviewing the Description and Operation will help you determine the correct diagnostic procedure when a malfunction exists. Reviewing the Description and Operation will also help you determine if the condition described by the customer is normal operation.

After reviewing the system description and operation, always begin the system diagnosis with the Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Output Controls

IPM Output Controls

Scan Tool Data List

IPM Data List

Circuit Description

When the windshield wiper switch is in the ON position, it sends a voltage signal through a 24 K ohm resistor and the windshield wiper switch signal 2 circuit to the windshield wiper/washer module indicating the wiper request. This voltage signal is also sent to the instrument panel module (IPM) indicating the wiper request. When the windshield washer switch is pressed, battery positive voltage is applied through the switch contacts by-passing the 24 K ohm resistor, then through the same windshield wiper switch signal 2 circuit to the wiper/washer module and the IPM indicating the washer request. The IPM counts each washer request and on the fourth request it will activate the low side drive output that controls the headlamp washer relay.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B2697 Headlamp Washer Request Circuit

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description in Vehicle DTC Information.

DTC B2697

Conditions for Running the DTC

The IPM must be awake with the ignition in the accessory, run, or crank request power modes.

Conditions for Setting the DTC

The IPM detects battery positive voltage on the windshield wiper switch signal 2 circuit for 30 seconds.

Action Taken When the DTC Sets

The IPM disables the headlamp washer function.

Conditions for Clearing the DTC

1. A current DTC clears when the malfunction is no longer present.
2. A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

DTC B2697

Symptoms - Wiper/Washer Systems

1. Perform «Diagnostic System Check - Vehicle»(/cadillac/sts/i-2004-2007/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information, 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.
2. Refer to the system description and operation from the following list in order to familiarize yourself with the system functions: «Wiper/Washer System Description and Operation»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) «Headlamp Washer System Description and Operation»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the Windshield Wiper/Washer System. Refer to «Checking Aftermarket Accessories»(/cadillac/sts/i-2004-2007/remont/body-electrical/#wiring-systems-electrical-power-management-introduction__checking-aftermarket-accessories) in Wiring Systems.
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 in Wiring Systems.

Symptom List

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

1. «Low Washer Fluid Indicator Malfunction»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__low-washer-fluid-indicator-malfunction)
2. «Washers Always On»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__washers-always-on)
3. «Washers Inoperative (Washer Pump)»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__washers-inoperative-washer-pump) or «Washers Inoperative (Heated Washer Nozzles XA7)»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__washers-inoperative-heated-washer-nozzles-xa7)
4. «Wipers Always On»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__wipers-always-on)
5. «Wipers Inoperative - All Modes»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system)
6. «Wipers Inoperative - One or More Modes»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system)
7. «Moisture Sensing Feature Inoperative»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__moisture-sensing-feature-inoperative)
8. «Washers Inoperative - Headlamp»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system)
9. «Washers Always On - Headlamp»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__washers-always-on-headlamp)

Low Washer Fluid Indicator Malfunction

Low Washer Fluid Indicator Malfunction

Washers Always On

Washers Always On

Washers Inoperative (Washer Pump)

Washers Inoperative (Washer Pump)

Washers Inoperative (Heated Washer Nozzles XA7)

Washers Inoperative (Heated Washer Nozzles XA7)

Wipers Always On

Wipers Always On

Diagnostic Aids

If the WPR MOD 30 A fuse is open, a short to ground in either one of the following circuits may be the cause

1. Accessory voltage circuit to the wiper module
2. Windshield washer pump control circuit

If the WPR SW 7.5 A fuse is open, a short to ground in any one of the following circuits may be the cause

1. Accessory voltage circuit to the switch
2. Windshield washer pump control circuit
3. Windshield wiper motor high speed circuit
4. Windshield wiper switch signal 1 circuit
5. Windshield wiper switch signal 2 circuit
6. Windshield wiper switch On signal circuit

Wipers Inoperative - All Modes

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 3: This step tests verifies the high-speed operation of the wiper motor. With the wiper switch in the high-speed position, and with an open in the wiper motor high speed signal circuit, the wiper motor will operate in the low-speed mode.
2. 7: This step tests for continuity through the 24K ohms resistor in the windshield wiper/washer switch. The connector behind the instrument panel knee bolster is suitable for performing this step.
3. 8: This step tests for continuity through the delay resistors in the windshield wiper/washer switch. The measured resistance will change in sequence from high to low as the delay speed is increased. The connector behind the instrument panel knee bolster is suitable for performing this step.

Wipers Inoperative - One or More Modes

Moisture Sensing Feature Inoperative

Moisture Sensing Feature Inoperative

The number below refers to the step number on the diagnostic table.

1. 7: This step tests the integrity of the control circuit of the headlamp washer motor. If the fuse in the jumper wire opens when you perform this test, a short to ground may have occurred.

Washers Inoperative - Headlamp

Washers Always On - Headlamp

Washers Always On - Headlamp

Wiper Arm Tip Pressure Check

1. Run the wiper arm and blade assemblies to the mid wipe position.
2. Remove the blade from the arm.
3. Attach a scale to the wiper arm tip and measure the force required to lift the arm perpendicular to the windshield to the normal working height of the arm (the height with the blade attached). The force required should be between 8.3-10.1 N (30-36 oz).
4. Replace the arm if the tip pressure is not within specifications. Refer to «Wiper Arm Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

Wiper Blade Element Check

1. Remove the wiper blade from the wiper arm. Refer to «Wiper Arm Blade Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Look down the entire length of the blade element.
3. The rubber part of the element (2) that contacts the window must be on the center line of the blade plus or minus 15 degrees (1).
4. Replace the element (2) if the element exceeds 15 degrees from the centerline of the blade, or if the element is cracked or torn. Refer to «Wiper Blade Element Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
5. Install the wiper blade onto the wiper arm. Refer to «Wiper Arm Blade Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

Scheme 9

Solvent Container, Pump, Level Sensor Replacement - Windshield Washer

Scheme 10

Solvent Container, Pump, Level Sensor Replacement - Headlamp Washer

Removal Procedure

1. Open the hood.
2. Remove the hood insulator. Refer to «Striker, Insulator, Seal Replacement - Hood»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
3. Disconnect the washer hose connections (2) from the washer nozzles.
4. Remove the washer nozzles from the hood by pushing the tension clips (2) in towards the windshield.
5. Push the washer nozzle (1), outward toward the windshield.
6. Remove the inoperative washer nozzle (1) from the hood.

Installation Procedure

1. Install the washer nozzle (1) to the hood by indexing the tension clips (2) on the nozzle to the opening in the hood.
2. Push downward in order to secure the washer nozzle tension clips (2) to the hood.
3. Connect the washer hose connections (2) to the washer nozzles.
4. Install the hood insulator. Refer to «Striker, Insulator, Seal Replacement - Hood»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
5. Close the hood.

1. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
2. Remove the radiator support sight shield. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
3. Drain the washer solvent into a suitable container.
4. Disconnect the headlamp washer hose (1) quick connect (3) from the washer pump nozzle located on the rear outboard corner of the washer solvent reservoir.
5. Remove the left front headlamp.
6. Disconnect the headlamp washer hose quick connects from the headlamp washer nozzles located on the bottom side of the headlamps.
7. Disconnect the washer hose clips from the fascia.
8. Remove the washer hose assembly from the vehicle.

1. Position the washer hose assembly to the vehicle.
2. Secure the washer hose clips to the electrical main body harness.
3. Secure the headlamp washer hose quick connects to both headlamp washer nozzles.
4. Secure the washer hose quick connect to the headlamp washer pump nozzle (1).
5. Install the left front headlamp.
6. Install the radiator support sight shield. Refer to «Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
7. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
8. Fill the reservoir with washer solvent.
9. Verify the operation of the headlamp washers.

1. Remove the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
2. Disconnect the washer hose (2) from the washer pump (5).
3. Drain the washer solvent into a suitable container.
4. Remove the hood insulator. Refer to «Striker, Insulator, Seal Replacement - Hood»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
5. Remove the passenger side air inlet grille. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
6. Disconnect the washer hose retainer clip (1) from the inside of the hood hinge.
7. Disconnect the washer hose connections (3, 6) from the washer nozzles.
8. Remove the washer hose from the passenger side inner fender.
9. Remove the hose rearward from the passenger side hood hinge.
10. Remove the washer hose from the vehicle.

1. Position the washer hose around the passenger side hood hinge (1).
2. Route the hose (washer pump end first) forward behind the bracket securing the inner fender to the wheelhouse.
3. Route the hose (4) downward to the washer solvent container.
4. Secure the washer hose retainer (1) to the inside edge of the hood hinge.
5. Connect the washer hose connections (2) to the washer nozzles.
6. Install the passenger side air inlet grille (1). Refer to «Air Inlet Grille Panel Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
7. Install the hood insulator. Refer to «Striker, Insulator, Seal Replacement - Hood»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
8. Connect the washer hose (2) to the washer pump (5).
9. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
10. Fill the washer solvent container.
11. Verify washer operation.

Tools Required

J 39822 Wiper Arm Puller. See Special Tools .

1. Set the wipers in the Park position.
2. Open the hood assembly.
3. The driver side wiper (4) aligns with an orange line at the tip of the wiper blade located at the center lower windshield.
4. The passenger side wiper (1) aligns with an orange dot at the tip of the wiper blade located on the right lower side of the windshield.
5. Remove the covers (2,5) from the wiper arm nuts (3,6).
6. Remove the nut (3,6) from the wiper arm drive spindle.
7. Remove the upper hood assist rods from the assist rod ball studs (1) if removing the driver side wiper arm.
8. Tilt the hood rearward to the air inlet grille panel.
9. Support the hood assembly.
10. Remove the wiper arm from the wiper arm drive spindle.
11. Clean the drive spindle knurls with a fine wire brush.
12. Remove the wiper blade from the wiper arm. Refer to «Wiper Arm Blade Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

1. Install the wiper blade onto the wiper arm. Refer to «Wiper Arm Blade Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Position the passenger side wiper arm so the wiper blade tip (1) aligns with the orange dot on the lower outer edge of the windshield.
3. Position the driver side wiper arm so that the wiper blade tip (4) aligns with the orange line on the lower center of the windshield.
4. Install the wiper arm onto the wiper arm drive spindle.
5. Install the nut (3,6) on the wiper arm. Tighten: Tighten the nut to 35 N.m (26 lb ft).
6. Secure the upper hood assist rods onto the assist rod ball studs (1) located on the hood assembly.
7. Install the wiper arm nut covers.
8. Close the hood assembly.
9. Operate the wipers and wash pattern (2) in order to verify the operation.
10. Verify the driver side wiper does not exceed the wipe area (3).

1. Cycle the wiper blades to the mid-wipe position on the glass.
2. Push in the button of the wiper blade clip and remove the wiper blade from the inside radius of the wiper arm.
3. Bring the wiper arm out through the opening in the wiper blade.

1. Insert the hook of the wiper arm through the opening in the wiper blade.
2. Position the wiper blade pivot in the inside radius of the wiper arm hook.
3. Pull the wiper blade pivot into the wiper arm hook until the pivot locks into the hook.
4. Ensure the blade is locked onto the wiper arm.
5. Return the wiper blades to the park position.
6. Operate the wipers and check for proper operation.

1. Remove the wiper blade from the wiper arm. Refer to «Wiper Arm Blade Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Remove the bottom claws (2) of the wiper blade (1) from the notches in the wiper blade element (3).
3. Pull the wiper blade element (3) out through the wiper blade claws (2).

1. Insert the open end of the wiper blade element (3) into the bottom claws of the wiper blade (2).
2. Guide the wiper blade element (3) through the wiper blade (1) claw sets.
3. Engage the bottom claw (2) of the wiper blade (1) into the notches in wiper blade element (3).
4. Install the wiper blade onto the wiper arm. Refer to «Wiper Arm Blade Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

1. Remove the wiper motor module. Refer to «Wiper Motor Module Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Remove the fasteners (2) from the wiper motor cover (3).
3. Carefully remove the wiper motor cover from the wiper motor housing (1).

1. Ensure the wiper motor cover housing sealing surface is clean and dry.
2. Position the wiper motor cover (3) to the wiper motor housing.
3. Install the wiper motor cover fasteners (2).
4. Tighten the fasteners in an "X" pattern as follows: Tighten: Tighten the fasteners on the first pass to .67 N.m (6 lb in). Tighten: Tighten the fasteners on the second pass to 1.35 N.m (12 lb in). Tighten: Tighten the fasteners on the third and final pass to 2.0 N.m (18 lb in) to ensure equal sealing pressure is applied to the cover seal.
5. Install the wiper motor module. Refer to «Wiper Motor Module Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .

Wiper Motor Replacement (LHD)

Tools Required

1. J 39232 Wiper Linkage Separator. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .
2. J 39529 Wiper Linkage Installer. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .

1. Remove the wiper motor module assembly (1). Refer to «Wiper Motor Module Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Remove the drive links from the wiper motor crank arm to the wiper motor using the J 39232 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .
3. Remove the 3 screws (1) retaining the wiper motor to the wiper motor module.
4. Remove the wiper motor.

1. Install the wiper motor onto the wiper motor module assembly with the screws (1). Tighten: Tighten the screws to 10 N.m (89 lb in).
2. Install the drive links onto the wiper motor crank arm using the J 39529 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .
3. Install the wiper motor module assembly (1). Refer to «Wiper Motor Module Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
4. Operate the wipers and check for proper operation.

Wiper Transmission Replacement

Tools Required

1. J 39232 Wiper Linkage Separator. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .
2. J 39529 Wiper Linkage Installer. See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .

1. Remove the wiper arms (1,4). Refer to «Wiper Arm Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
2. Remove the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
3. Pull or push on the wiper transmission linkage to rotate the wiper motor crank arm (2) from the park position (1) to the area opposite the park position (3).
4. Disconnect the wiper motor harness connector (4).
5. Remove the 2 screws (3,5) retaining the wiper system drive module.
6. Remove the wiper system drive module (1) from the vehicle.
7. Remove the drive links from the wiper motor crank arm and the wiper transmission drive shafts with the J 39232 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .
8. Remove the transmission links from the module.

1. Position the transmission drive links (4) to the pivot arms (3,5).
2. Install the drive links onto the wiper motor crank arm and the wiper transmission drive shafts with the J 39529 . See «Special Tools»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__special-tools) .
3. Install the wiper motor module assembly Refer to «Wiper Motor Module Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
4. Install the air inlet grille panel. Refer to «Air Inlet Grille Panel Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
5. Install the wiper arms (1,4). Refer to «Wiper Arm Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
6. Operate the wipers and check for proper operation.

1. Remove the wiper motor mini 10 A and 30 A fuses. The wiper motor fuses are located in the underhood fuse block.
2. Remove the wiper arm assemblies. Refer to «Wiper Arm Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
3. Remove the air inlet grille (1,3). Refer to «Air Inlet Grille Panel Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
4. Remove the wiper motor module mounting bolts (3,5).
5. Disconnect the wiper motor electrical connector (4).
6. Remove the wiper motor module (1) from the vehicle.

1. Place the wiper motor module into the vehicle.
2. Connect the wiper motor module electrical connector (4).
3. Align the wiper module locator hole (7) to the pin located inside rail of the driver side fender.
4. Align the locator hole (6) to the hole in the pillar flange.
5. Install the outer bolt (5). Tighten: Tighten the outer bolt to 10 N.m (89 lb in).
6. Install the center bolt (3). Tighten: Tighten the center bolt to 10 N.m (89 lb in).
7. Install the air inlet grille (1,3). Refer to «Air Inlet Grille Panel Replacement»(/cadillac/sts/i-2004-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
8. Install the wiper arm assemblies. Refer to «Wiper Arm Replacement»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system) .
9. Install the wiper motor fuses to the underhood fuse block.

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. Perform the wiper arm pressure test. Refer to «Wiper Arm Tip Pressure Check»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__wiper-arm-tip-pressure-check) .
2. Inspect the wiper blade element set. Refer to «Wiper Blade Element Check»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__wiper-blade-element-check) .
3. Clean the windshield glass. Refer to «Windshield Glass Cleaning»(/cadillac/sts/i-2004-2007/remont/wiperwasher-systems/#wiper-system-and-washer-system__windshield-glass-cleaning) .

Windshield Glass Cleaning

Clean the windshield with windshield cleaner, GM P/N 1050011 (Canadian P/N 992727) 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.

Scheme 11

Headlamp Washer Nozzle Assembly Replacement

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 3»(/cadillac/sts/i-2004-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.
2. Remove the steering column trim covers. Refer to «Steering Column Trim Covers Replacement»(/cadillac/sts/i-2004-2007/remont/steering-column-switches/#steering-wheel-steering-column) in Steering Wheel and Column.
3. Remove the steering column wiring harness tie straps.
4. Disconnect the electrical connectors (1, 3) from the windshield and washer switch.
5. Depress the locking tab (2) on the windshield wiper and washer switch (1) and remove the switch from the steering column.

1. Install the windshield wiper and washer switch (1) to the steering column.
2. Connect the electrical connectors (1, 3) on the windshield wiper and washer switch.
3. Route and connect the electrical connector from the windshield wiper and washer switch.
4. Install the wiring harness tie straps.
5. Install the steering column trim covers. Refer to «Steering Column Trim Covers Replacement»(/cadillac/sts/i-2004-2007/remont/steering-column-switches/#steering-wheel-steering-column) in Steering Wheel and Column.
6. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 3»(/cadillac/sts/i-2004-2007/remont/airbag/#supplemental-inflatable-restraint-system) in SIR.

Wiper/Washer System Components

The Wiper/Washer System consists of the following components

1. Windshield wiper/washer switch
2. Windshield wiper/washer module
3. Instrument panel module
4. Outside moisture sensor
5. Windshield/headlamp washer motor assembly
6. Windshield washer fluid level switch
7. Headlamp washer fluid pump relay
8. Heated Washer Nozzles
9. WPR SW Fuse 7.5 A
10. WPR MOD Fuse 30 A
11. WASH NOZ Fuse 10 A
12. HEADLAMP WASHER Circuit Breaker 30 A

Modes of Operation

The normal wiper system function positions are as follows

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

The manual low speed and manual high speed wiper modes are continuous wiper operations as selected via the wiper switch.

Automatic Modes of Operation

The rain sensing windshield wiper system function positions are as follows

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 windshield wiper/washer module. 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.

Battery positive voltage is supplied to the outside moisture sensor through the accessory voltage circuit and RAIN SSR fuse located in the underhood fuse block. The sensor is grounded through the ground circuit and G402. Whenever the ignition is in the run or accessory positions, the windshield wiper/washer module sends the wiper/washer switch status using a pulse width modulation (PWM) signal through the 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 wiper/washer module 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 moisture sensor and wiper/washer module is lost, the wiper/washer module will use the inputs from the windshield wiper/washer switch in the delay positions to operate the wiper motor at continuous variable delay intervals.

Power and Grounds

Accessory voltage is supplied to the windshield wiper/washer module from the WPR MOD fuse located in the underhood fuse block. This voltage allows the wiper/washer system to operate only when the ignition switch is in the Accessory or On positions. The module is grounded through the module ground circuit and G101.

Accessory voltage is supplied to the windshield wiper/washer switch from the WPR SW Fuse located in the underhood fuse block.

Wiper/Washer System Operation

The windshield wiper/washer module is part of the windshield wiper motor cover and controls wiper motor operation. The accessory voltage supplied to the windshield wiper motor assembly is used to operate the wiper motor in all modes. The windshield wiper motor is a 2 speed motor and is operated at low speed in all modes except HIGH. When the wiper/washer switch is activated, battery voltage is applied through the switch contacts, a series of resistors, and through the wiper switch signal circuits to the wiper/washer module. The voltage level of these signal circuits determine the windshield wiper/washer modes of operation. The following is a list of wiper/washer modes of operation

1. Manual Low Speed: When the wiper/washer switch is in the LOW position, battery voltage is applied through a 24K ohm resistor and the windshield wiper switch signal 2 circuit to the module. Battery voltage is also applied through the windshield wiper switch signal 1 circuit to the module. The reduced voltage from the wiper switch signal 2 circuit and voltage from the wiper switch signal 1 circuit indicates the manual low request. In response to these signals, the wiper/washer module applies voltage to its internal wiper motor LOW speed terminal and the wiper motor runs in the manual LOW speed mode.
2. MIST: Windshield wiper/washer system MIST operation is identical to LOW operation, as described above, except that the MIST switch is a press and release type. When the wiper switch is moved to the MIST position and released, low speed wiper motor operation is started and will continue until 1 cycle is complete. If the wiper switch is moved to the MIST position and held, the windshield wiper motor will operate in the LOW mode until the switch is released.
3. DELAY: Windshield wiper DELAY operation is also a low speed wiper motor function, but with a variable delay interval between the wiper motor cycles. The DELAY interval is controlled through a series of resistors within the wiper/washer switch. During DELAY wiper operation the wiper switch signal 2 circuit is at the same voltage level used for LOW speed operation, but the wiper switch signal 1 circuit voltage is reduced through the DELAY resistors. The windshield wiper/washer module uses a capacitor that is fed by the wiper switch signal 1 circuit to determine the frequency of the low speed wiper motor cycles. When the wiper switch signal 1 circuit is at a high voltage level as in the LOW switch position, the higher voltage charges the capacitor fast, causing a delayed, but continuous LOW speed wiper motor operation. The DELAY switch position indicating the longest interval between wiper motor cycles, is the switch position with the highest resistance, resulting in low voltage on the wiper switch signal 1 circuit. This low voltage charges the capacitor slowly, causing a long delay interval between wiper motor cycles. As the DELAY switch is turned to positions indicating more frequent wiper cycles, the resistance through the wiper/washer switch is reduced and the wiper switch signal 1 circuit voltage increases. When the wiper switch signal 1 circuit voltage increases the capacitor charges faster and the delay interval between wiper motor cycles decreases.
4. Manual HIGH Speed: When the wiper switch is placed in the HIGH position, battery voltage is applied through the switch contacts and the wiper switch signal 1 circuit, wiper switch signal 2 circuit, and the high speed signal circuit to the wiper/washer module. During HIGH speed wiper operation, the wiper switch signal 1 and signal 2 circuits are at the LOW speed signal voltages, but, the LOW speed signal circuit inputs to the wiper/washer module are overridden by the active HIGH speed signal circuit. In response to this signal, the wiper/washer module applies voltage to its internal wiper motor high speed terminal and the wiper motor runs in the manual high speed mode.
5. WASH: The outside moisture sensor monitors the WASH switch to determine if the wash function is selected. When active, the moisture sensor uses this information to ignore the wash water input to the algorithm. During windshield wiper/washer system WASH operation, the wiper/washer module controls the operation of both, the wiper motor and the windshield washer pump. When the WASH switch is pressed, battery voltage is applied through the switch contacts and the windshield wiper/washer switch signal 2 circuit to the wiper/washer module indicating the wash command. The wiper/washer module then applies battery voltage to its internal wiper motor low speed terminal and the windshield washer pump control circuit for a minimum of 3.5 seconds or as long as the WASH command is active, followed by approximately 6 seconds of wiper motor operation.
6. PARK or OFF: Windshield wiper motor park operation is controlled by the wiper/washer module using an input from the PARK switch within the wiper motor assembly. When the windshield wiper/washer switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the wiper/washer module will continue to operate the wiper motor until the wipers reach the PARK position.
7. Automatic Delay: The wipers are normally in the PARK position. The moisture sensor determines the dwell time appropriate for the amount of precipitation on the windshield after considering the wiper switch SENSITIVITY setting. When moisture accumulation indicates a wipe is needed, the moisture sensor signals the wiper/washer module to clear the precipitation from the windshield. For all automatic delay operations the outside moisture sensor commands the wipers to operate in LOW speed for one wipe.
8. Automatic Low: Automatic LOW speed operation is utilized when the amount of precipitation on the windshield exceeds the automatic delay threshold. With a steady amount of precipitation on the windshield, the algorithm written for this threshold will prevent cycling between automatic delay and automatic LOW speed operation.
9. Automatic High: Automatic HIGH speed operation is utilized when the amount of precipitation on the windshield exceeds the automatic low threshold. With a steady amount of precipitation on the windshield, the algorithm written for this threshold will prevent cycling between automatic LOW and automatic HIGH speed operation.

Heated Washer Nozzles

The purpose of the heated washer nozzles is to prevent nozzle freeze-up in cold weather. With the ignition in the ON position, battery positive voltage is applied to both washer nozzles from the 10 A WASH NOZ fuse located in the underhood fuse block. The washer nozzles are permanently grounded to G101. They are in operation at all times when the ignition is in the ON position, nothing else controls their operation.

Check Washer Fluid Message

The CHECK WASHER FLUID message is controlled by the instrument panel module (IPM) using an input from the washer fluid level switch. With the ignition is in the ON position, the IPM applies ignition voltage through an internal resistor and the windshield washer fluid level signal circuit to the windshield washer fluid level switch. The IPM 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 IPM 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 IPM displays the CHECK WASHER FLUID message on the driver information center (DIC). In order to prevent the CHECK WASHER FLUID message from being displayed while sloshing is occurring in the washer fluid container, the IPM is programed with a 1 minute delay before changing states of the CHECK WASHER FLUID message during an ignition cycle.

Headlamp Washer System Components

The headlamp washer system consists of the following components

1. Windshield wiper/washer switch
2. Instrument panel module (IPM)
3. Headlamp washer relay
4. Headlamp washer fluid pump
5. HDLP WSHR module circuit breaker 30A

Battery positive voltage is supplied to the headlamp washer fluid pump relay through the ignition 1 voltage circuit and the accessory fuse located in the underhood fuse block with the ignition in the ON or Run position. Battery positive voltage is also supplied at all times to the headlamp washer fluid pump relay through the battery positive voltage circuit and the HDLP WSHR module circuit breaker located in the underhood fuse block. This voltage is used to run the headlamp washer pump motor. The pump motor is grounded through the pump motor ground circuit and G101.

Headlamp Washer System Operation

When the washer switch is pressed, the windshield wiper switch sends a voltage signal through windshield washer switch signal circuit to the wiper motor module and the instrument panel module (IPM) indicating the wash command. Every fourth time the windshield washer system is commanded ON, the IPM will initiate a headlamp wash cycle by pulling the headlamp washer relay control circuit low energizing the relay. The relay then closes its switch contacts applying battery positive voltage through the headlamp washer pump motor control circuit to the headlamp washer pump motor. The pump motor then runs spraying washer fluid on the headlamps. A headlamp wash cycle consists of a prewash, then a pause, and then a wash operation.

Special Tools

Special Tools Illustration Tool Number/ Description J 39232 Wiper Linkage Separator J 39529 Wiper Linkage Installer J 39822 Wiper Arm Puller

Scheme 12

Scheme 13

Scheme 14

See also:
• Diagnostic System Check - Vehicle
• DTC Symptom Description
• Testing for Intermittent Conditions and Poor Connections
• Circuit Testing
• Wiring Repairs
• Connector Repairs
• Control Module References
• Checking Aftermarket Accessories
• Multifunction, Turn Signal Switch Replacement
• Relay Replacement (Within an Electrical Center)
• Fastener Notice
• Lifting and Jacking the Vehicle
• Tire and Wheel Removal and Installation
• Air Deflector Replacement - Front
• Fascia, Extension, Reinforcement, Impact Bar Replacement - Front Bumper
• Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front
• SIR Caution
• SIR Disabling and Enabling Zone 3
• Wiper/Washer System Schematics
• Wiper/Washer System Connector End Views
• Low Washer Fluid Indicator Malfunction
• Washers Always On
• Washers Inoperative (Washer Pump)
• Washers Inoperative (Heated Washer Nozzles XA7)
• Wipers Always On
• Moisture Sensing Feature Inoperative
• Washers Always On - Headlamp
• Symptoms - Wiper/Washer Systems
• Wiper Motor Replacement (LHD)
• Fastener Tightening Specifications
• Special Tools
• Wiper Arm Tip Pressure Check
• Wiper Blade Element Check
• Windshield Glass Cleaning