Intermittent
- If the wipers operate at low speed for approximately 3 seconds and then stop, the wiper motor park switch or its signal circuit, may be malfunctioning. Refer to «Wipers Inoperative - One or More Modes»(ref-241701-S13796381192006081100000) .
- Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to «Testing for Intermittent Conditions and Poor Connections»(ref-241671-S27410119602006081100000) in Wiring Systems.
Washers Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn the ignition to the ON position. Is the windshield washer pump ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Disconnect the windshield wiper/washer switch. Does the washer turn OFF? | Go to Step 7 | Go to Step 4 |
| 4 | Disconnect the body control module (BCM) connector C3. Does the washer turn OFF? | Go to Step 8 | Go to Step 5 |
| 5 | Disconnect the BCM connector C1. Does the washer turn OFF? | Go to Step 9 | Go to Step 6 |
| 6 | Test for a short to battery positive voltage in the windshield washer pump control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 11 | Go to Step 10 |
| 7 | Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 11 | |
| 8 | Repair a short to ground in the windshield washer switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 11 | |
| 9 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 11 | |
| 10 | Replace the windshield washer fluid pump. Refer to Washer Pump Replacement . Did you complete the replacement? | Go to Step 11 | |
| 11 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Washers Always On
Washers Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn the ignition to the ON position. Press the windshield washer switch. Does the windshield washer pump operate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Disconnect the body control module (BCM) connector C1. Install a fused jumper between battery positive voltage and the windshield washer pump control circuit. Does the windshield washer fluid pump operate? | Go to Step 6 | Go to Step 4 |
| 4 | Disconnect the windshield washer pump. Connect the BCM connector C1. Using a test lamp probe between windshield washer pump control circuit and ground. Turn the ignition to the ON position. Press the washer switch. Does the test lamp illuminate? | Go to Step 5 | Go to Step 8 |
| 5 | Test for a poor connection or an open in the ground circuit of the windshield washer fluid pump. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
| 6 | Disconnect the windshield wiper/washer switch. Install a jumper between windshield washer switch signal circuit and ground. Turn the ignition to the ON position. Does the windshield washer fluid pump operate? | Go to Step 10 | Go to Step 7 |
| 7 | Test for a poor connection, an open or a short to battery positive voltage in the windshield washer switch signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 11 |
| 8 | Repair a poor connection, an open or a short to ground in the windshield washer pump control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 12 | |
| 9 | Replace the windshield washer fluid pump. Refer to Washer Pump Replacement . Did you complete the replacement? | Go to Step 12 | |
| 10 | Replace the windshield washer switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 12 | |
| 11 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 12 | |
| 12 | Operate the system to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Washers Inoperative
Wipers Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn the ignition to the ON position. Are the windshield wipers ON? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Remove the WPR2 relay. Are the windshield wipers ON? | Go to Step 4 | Go to Step 7 |
| 4 | Are the windshield wipers operating at a high speed? | Go to Step 5 | Go to Step 6 |
| 5 | Test for a short to battery positive voltage in the windshield wiper motor high speed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 20 |
| 6 | Test for a short to battery positive voltage in the windshield wiper motor low speed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 20 |
| 7 | Using a test lamp connected to ground, probe the WPR2 relay control circuit at the underhood fuse block. Does the test lamp illuminate? | Go to Step 13 | Go to Step 8 |
| 8 | Install the WPR2 relay. Remove the WPR1 relay. Are the windshield wipers ON? | Go to Step 20 | Go to Step 9 |
| 9 | Using a test lamp connected to ground, probe the WPR1 relay control circuit. Does the test lamp illuminate? | Go to Step 10 | Go to Step 21 |
| 10 | Install the WPR1 relay. Disconnect the windshield wiper/washer switch. Are the windshield wipers ON? | Go to Step 11 | Go to Step 22 |
| 11 | Disconnect the body control module (BCM) connector C3. Using a test lamp connected to battery positive voltage, probe the windshield wiper switch low signal circuit at the windshield wiper/washer switch. Does the test lamp illuminate? | Go to Step 17 | Go to Step 12 |
| 12 | Disconnect the BCM connector C1. Remove the WPR1 relay. Using a test lamp connected to ground, probe the WPR1 relay control circuit at the underhood electrical center. Does the test lamp illuminate? | Go to Step 18 | Go to Step 23 |
| 13 | Disconnect the windshield wiper/washer switch. Using a test lamp connected to ground, probe the WPR1 relay control circuit at the underhood electrical center. Does the test lamp illuminate? | Go to Step 14 | Go to Step 22 |
| 14 | Disconnect the BCM connector C3. Using a test lamp connected to battery positive voltage, probe the windshield wiper switch high signal circuit. Does the test lamp illuminate? | Go to Step 19 | Go to Step 15 |
| 15 | Disconnect the BCM connector C1. Using a test lamp connected to ground, probe the WPR2 relay control circuit at the BCM. Does the test lamp illuminate? | Go to Step 16 | Go to Step 23 |
| 16 | Test for a short to ground in the WPR2 relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 20 |
| 17 | Repair a short to ground in the windshield wiper switch low signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 18 | Repair a short to battery positive voltage in the WPR1 relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 19 | Repair a short to ground in the windshield wiper switch high signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 20 | Replace the underhood electrical fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 24 | |
| 21 | Replace the WPR1 relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 24 | |
| 22 | Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the repair? | Go to Step 24 | |
| 23 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 24 | |
| 24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Wipers Always On
Wipers Inoperative - All Modes
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn the ignition to the ON position. Attempt to operate the wipers in each mode. Are the wipers inoperative in all modes? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Disconnect the windshield wiper motor. Using a test lamp connected to ground, probe the windshield wiper motor low speed circuit. Turn the ignition to the ON position. Turn the windshield wipers to a low speed. Does the test lamp illuminate? | Go to Step 4 | Go to Step 5 |
| 4 | Test for a poor connection or an open in the ground circuit of the windshield wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 11 |
| 5 | Connect the windshield wiper motor. Remove the WPR2 relay from the underhood fuse block. Using a test lamp connected to battery positive voltage, probe the WPR2 relay switched input circuit. Turn the wiper switch OFF. Turn the ignition to the OFF position. Does the test lamp illuminate? | Go to Step 9 | Go to Step 6 |
| 6 | Remove the WPR1 relay. Using a test lamp connected to battery positive voltage, probe the ground circuit of the WPR1 relay. Does the test lamp illuminate? | Go to Step 7 | Go to Step 12 |
| 7 | Using a test lamp connected to ground, probe the FRT WPR fuse circuit of the WPR1 relay. Does the test lamp illuminate? | Go to Step 8 | Go to Step 13 |
| 8 | Replace the WPR1 relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Do the windshield wipers operate normally? | Go to Step 16 | Go to Step 13 |
| 9 | Disconnect the windshield wiper/washer switch. Install a jumper between the ground circuit and the windshield wiper switch low signal circuit at the windshield wiper/washer switch connector. Turn the ignition to the ON position. Do the windshield wipers operate normally? | Go to Step 14 | Go to Step 10 |
| 10 | Test for a poor connection or an open in the ground circuit of the windshield wiper/washer switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 15 |
| 11 | Replace the windshield wiper motor. Refer to Wiper Motor Replacement . Did you complete the replacement? | Go to Step 16 | |
| 12 | Repair a poor connection or an open in the ground circuit of the WPR1 relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 16 | |
| 13 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 16 | |
| 14 | Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 16 | |
| 15 | Replace the body control module (BCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 16 | |
| 16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Wipers Inoperative - All Modes
Wipers Inoperative - One or More Modes
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Turn the ignition to the ON position. Attempt to operate the wipers in each mode. Are the wipers inoperative in all modes? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Are the wiper inoperative in high speed mode? | Go to Step 5 | Go to Step 4 |
| 4 | Are all of the low speed mode inoperative? | Go to Step 13 | Go to Step 18 |
| 5 | Disconnect the windshield wiper motor. Using a test lamp connected to ground, probe the windshield wiper motor high speed circuit. Turn the ignition to the ON position. Turn the wiper to the high speed setting. Does the test lamp illuminate? | Go to Step 19 | Go to Step 6 |
| 6 | Connect the windshield wiper motor. Remove the WPR2 relay. Using a test lamp connected to battery positive voltage, probe the ground circuit of the WPR2 relay. Does the test lamp illuminate? | Go to Step 7 | Go to Step 20 |
| 7 | Using a test lamp connected to ground, probe the WPR2 relay control circuit at the WPR1 relay. Turn the ignition to the ON position. Turn the wipers to the high speed setting. Does the test lamp illuminate? | Go to Step 8 | Go to Step 10 |
| 8 | Leave the switch in the high position. Using a test lamp, probe between the WPR2 relay control circuit and the windshield wiper motor high speed circuit. Does the test lamp illuminate? | Go to Step 22 | Go to Step 9 |
| 9 | Test for a poor connection, an open or a short to ground in the windshield wiper motor high speed circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 20 |
| 10 | Disconnect the windshield wiper switch. Install the WPR2 relay. Install a jumper between ground and windshield wiper switch high signal circuit. Turn the ignition to the ON position. Do the high speed wipers operate? | Go to Step 18 | Go to Step 11 |
| 11 | Test for a poor connection, short to battery or an open in the windshield wiper switch high signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 12 |
| 12 | Test for a poor connection, short to ground or an open in the WPR2 relay control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 21 |
| 13 | Disconnect the windshield wiper motor. Using a test lamp connected to ground, probe the windshield wiper motor low speed circuit. Turn the ignition to the ON position. Turn the wiper switch to a low position. Does the test lamp illuminate? | Go to Step 19 | Go to Step 14 |
| 14 | Connect the windshield wiper motor. Leave the windshield wiper switch in a low position. Disconnect the WPR2 relay. Using a test lamp connected between battery positive voltage and the windshield wiper motor low control circuit. Does the test lamp illuminate? | Go to Step 16 | Go to Step 15 |
| 15 | Test for a poor connection or an open in the windshield wiper motor low control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 20 |
| 16 | Disconnect the windshield wiper/washer switch. Install the WPR1 relay. Install a jumper between ground and the windshield wiper switch low signal circuit. Turn the ignition to the ON position. Does the windshield wiper turn ON in a low position? | Go to Step 18 | Go to Step 17 |
| 17 | Test for a poor connection or an open in the windshield wiper switch low signal circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 23 | Go to Step 21 |
| 18 | Replace the windshield wiper/washer switch. Refer to Multifunction, Turn Signal Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 23 | |
| 19 | Replace the windshield wiper motor. Refer to Wiper Motor Replacement . Did you complete the replacement? | Go to Step 23 | |
| 20 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 23 | |
| 21 | Replace the body control module (BCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the replacement? | Go to Step 23 | |
| 22 | Replace the WPR2 relay. Refer to Relay Replacement (Within an Electrical Center) or Relay Replacement (Attached to Wire Harness) in Wiring Systems. Did you complete the replacement? | Go to Step 23 | |
| 23 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Wipers Inoperative - One or More Modes
Washer Inoperative - Rear
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Wiper/Washer System Connector End Views | |||
| 1 | Did you review the Rear Wiper/Washer System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Wiper/Washer Systems |
| 2 | Turn the ignition ON. Press the rear washer switch. Does the rear washer operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Does the rear wiper motor operate when the washer switch is pressed? | Go to Step 6 | Go to Step 4 |
| 4 | Disconnect the rear wiper motor connector. Connect a test lamp from the rear washer control circuit terminal in the wiper motor connector to a good ground. Turn the ignition ON. Press the rear washer switch. Does the test lamp illuminate when the rear washer switch is pressed? | Go to Step 10 | Go to Step 5 |
| 5 | Test the rear washer control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
| 6 | Disconnect the rear washer pump connector. Connect a test lamp from the rear washer control circuit terminal in the washer pump harness connector to a good ground. Turn the ignition ON. Press the rear washer switch. Does the test lamp illuminate when the rear washer switch is pressed? | Go to Step 7 | Go to Step 8 |
| 7 | Connect a test lamp from the rear washer control circuit terminal to the ground circuit terminal in the washer pump harness connector. Press the rear washer switch. Does the test lamp illuminate when the rear washer switch is pressed? | Go to Step 14 | Go to Step 9 |
| 8 | Repair the rear washer control circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 16 | |
| 9 | Repair the rear washer pump ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 16 | |
| 10 | Inspect for poor connections at the rear wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 11 |
| 11 | Replace the rear wiper motor. Refer to Wiper Motor Replacement - Rear . Is the repair complete? | Go to Step 16 | |
| 12 | Inspect for poor connections at the rear wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 13 |
| 13 | Replace the rear wiper/washer switch. Refer to Accessory Trim Plate, Driver Information Display Switch Replacement - Instrument Panel in Instrument Panel, Gages and Console. Is the repair complete? | Go to Step 16 | |
| 14 | Inspect for poor connections at the rear washer pump. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 16 | Go to Step 15 |
| 15 | Replace the rear washer pump. Refer to Washer Pump Replacement . Is the repair complete? | Go to Step 16 | |
| 16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Washer Inoperative - Rear
Wiper Always On - Rear
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Wiper/Washer System Connector End Views | |||
| 1 | Did you review the Rear Wiper/Washer System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Wiper/Washer Systems |
| 2 | Turn the ignition ON. Turn the rear wiper/washer switch to the OFF position. Is the rear wiper always on? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Disconnect the rear wiper motor connector. Turn the rear wiper/washer switch to the OFF position. Connect a test lamp from the rear wiper switch signal circuit terminal in the rear wiper motor harness connector to ground. Turn the ignition ON. Does the test lamp illuminate? | Go to Step 5 | Go to Step 4 |
| 4 | Connect a test lamp from the rear washer pump control circuit terminal in the rear wiper motor harness connector to ground. Turn the ignition ON. Does the test lamp illuminate? | Go to Step 6 | Go to Step 8 |
| 5 | Test the rear wiper switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
| 6 | Test the rear washer pump control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 9 | Go to Step 7 |
| 7 | Replace the rear wiper/washer switch. Refer to Accessory Trim Plate, Driver Information Display Switch Replacement - Instrument Panel in Instrument Panel, Gages and Console. Is the repair complete? | Go to Step 9 | |
| 8 | Replace the rear wiper motor. Refer to Wiper Motor Replacement - Rear . Is the repair complete? | Go to Step 9 | |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Wiper Always On - Rear
Wiper Inoperative - Rear
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Wiper/Washer System Schematics Connector End View Reference: Wiper/Washer System Connector End Views DEFINITION: The rear wiper motor is inoperative in one or more modes, the rear washer pump may or may not operate. | |||
| 1 | Did you review the Rear Wiper/Washer System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Wiper/Washer Systems |
| 2 | Turn the ignition ON, with the engine OFF. Operate the rear wiper/washer system in all the switch positions. Does the rear wiper/washer system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Does the rear wiper motor operate when the rear washer switch is pressed? | Go to Step 10 | Go to Step 4 |
| 4 | Does the rear washer pump operate when the rear washer switch is pressed? | Go to Step 11 | Go to Step 5 |
| 5 | Disconnect the harness connector of the rear wiper switch. Turn the ignition ON, with the engine OFF. Connect a test lamp from the accessory voltage circuit of the rear wiper switch to a good ground. Does the test lamp illuminate? | Go to Step 6 | Go to Step 12 |
| 6 | Connect a 20-amp fused jumper wire from the accessory voltage circuit to the signal circuit of the rear wiper switch. Does the rear wiper motor operate? | Go to Step 15 | Go to Step 7 |
| 7 | Turn OFF the ignition. Disconnect the harness connector of the rear wiper motor. Turn the ignition ON, with the engine OFF. Connect a test lamp from the signal circuit of the rear wiper switch to a good ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 18 |
| 8 | Connect a test lamp from the accessory voltage circuit of the rear wiper motor to a good ground. Does the test lamp illuminate? | Go to Step 9 | Go to Step 19 |
| 9 | Connect a test lamp from the accessory voltage circuit to the ground circuit of the rear wiper motor. Does the test lamp illuminate? | Go to Step 16 | Go to Step 20 |
| 10 | Turn OFF the ignition. Disconnect the harness connector of the rear wiper motor. Turn the ignition ON, with the engine OFF. Connect a test lamp from the signal circuit of the rear wiper switch to a good ground. Place the rear wiper switch in the Delay position. Does the test lamp illuminate? | Go to Step 16 | Go to Step 18 |
| 11 | Turn OFF the ignition. Disconnect the harness connector of the rear wiper motor. Turn the ignition ON, with the engine OFF. Connect a test lamp from the control circuit of the rear washer pump to a good ground. Depress the rear washer switch. Does the test lamp illuminate? | Go to Step 16 | Go to Step 21 |
| 12 | Test the accessory voltage circuit of the rear wiper switch for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 13 |
| 13 | Test the accessory voltage circuit of the rear wiper motor for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 14 |
| 14 | Test the signal circuit of the rear wiper switch for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 17 |
| 15 | Inspect for poor connections at the harness connector of the rear wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 22 |
| 16 | Inspect for poor connections at the harness connector of the rear wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 24 | Go to Step 23 |
| 17 | Repair a short to ground in the control circuit of the rear washer pump. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 18 | Repair an open or high resistance in the signal circuit of the rear wiper switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 19 | Repair an open or high resistance in the accessory voltage circuit of the rear wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 20 | Repair an open or high resistance in the ground circuit of the rear wiper motor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 21 | Repair an open or high resistance in the control circuit of the rear washer pump. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 24 | |
| 22 | Replace the rear wiper/washer switch. Refer to Accessory Trim Plate, Driver Information Display Switch Replacement - Instrument Panel in Instrument Panel, Gages and Console. Did you complete the replacement? | Go to Step 24 | |
| 23 | Replace the rear wiper motor. Refer to Wiper Motor Replacement - Rear . Did you complete the replacement? | Go to Step 24 | |
| 24 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Wiper Inoperative - Rear
Wiper Arm Pressure Check
- Run the wiper arms to the mid-wipe position.
- Remove the wiper blades from the wiper arms. Refer to «Wiper Arm Blade Replacement»(ref-241701-S02454174202006081100000) .
- 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).
- Replace the wiper arm if the measurement is not within the specification. Refer to «Wiper Arm Replacement»(ref-241701-S36566410302006081100000) . Tip Pressure: 8.3-10.1 Newtons (30-36 oz).
- Install the wiper blades on the wiper arms. Refer to «Wiper Arm Blade Replacement»(ref-241701-S02454174202006081100000) .
Wiper Blade Element Check
- Remove the wiper blades from the wiper arms. Refer to «Wiper Arm Blade Replacement»(ref-241701-S02454174202006081100000) .
- Look down the length of the blade element.
- Replace the wiper blade element if the rubber element which contacts the glass is not on the centerline of the blade +/15 degrees. Refer to «Wiper Blade Element Replacement»(ref-241701-S26042517002006081100000) .
- Install the wiper blades on the wiper arms. Refer to «Wiper Arm Blade Replacement»(ref-241701-S02454174202006081100000) .
Tools Required
J 39637 Wiper Arm Puller. See Special Tools .
- J 39232 Wiper Linkage Separator. See «Special Tools»(ref-241701-S05177558142006081100000) .
- J 39529 Wiper Linkage Installer. See «Special Tools»(ref-241701-S05177558142006081100000) .
- J 39232 Wiper Linkage Separator. See «Special Tools»(ref-241701-S05177558142006081100000) .
- J 39529 Wiper Linkage Installer. See «Special Tools»(ref-241701-S05177558142006081100000) .
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.
- Clean the windshield glass.
- Clean the wiper blade elements.
- Perform the wiper arm pressure test.
- Inspect the wiper blade element set.
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.
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.
J 39822 Wiper Arm Puller. See Special Tools .
Wiper/Washer System Components
The Wiper/Washer System consists of the following components
- Windshield wiper/washer switch
- Body control module (BCM)
- WPR1 relay
- WPR2 relay
- Windshield wiper motor
- Windshield washer pump
Refer to Wiper/Washer System Component Views .
Windshield Wiper/Washer System Power and Ground
The power source for the wiper system is supplied from the fuse block underhood. The WIPER/WS fuse supplies the current for the drive motor. The WASHER/RVC fuse supplies current to the body control module (BCM) for the control of the washer pump. G100 supplies the ground for the washer pump and washer fluid level switch. Refer to Wiper/Washer System Schematics .
G200 provides ground for the following
- Windshield wiper motor
- WPR1 relay
- WPR2 relay
Rear Wiper/Washer System Components
The rear wiper/washer system consists of the following components
- Rear wiper/washer switch
- Rear wiper motor
- Rear wiper motor module
- Rear washer pump