Rear Wiper System Malfunction
Rear Wiper System Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The rear wiper motor operation is controlled by suppling ignition voltage through the wiper switch to the rear wiper motor control circuits. Ignition voltage is supplied though the WIPER fuse.
Reference Information
Schematic Reference
Wiper/Washer Schematics (Hatchback) (Wiper/Washer Schematics (Hatchback))Wiper/Washer Schematics (Notchback) (Wiper/Washer Schematics (Notchback))
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Wiper/Washer System Description and Operation (Wiper/Washer System)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Circuit/System Verification
1. Ignition ON, Verify that the front windshield wipers operate.
• If the front windshield wipers do not operate, refer to Windshield Wiper System Malfunction (Windshield Wiper System Malfunction)
2. Verify the rear window wiper operates.
• If the rear window wiper does not operate, refer to rear wiper malfunction.
3. Verify the rear window wiper parks.
• If the rear widow wiper does not park, test or replace the rear window wiper motor.
Circuit/System Testing
Rear Wiper Malfunction with CD4
1. Ignition OFF, disconnect the harness connector at the rear windshield wiper motor.
2. Test for less than 1ohm between the ground circuit terminal 3 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 8 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
4. Place the rear wiper switch in the ON position, verify that a test lamp illuminates between the control circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the control circuit for an open/high resistance. If the circuit tests normal replace the wiper switch.
5. Connect a test lamp between the control circuit terminal 2 and ground.
6. Observe the test light while applying the rear washer switch. The test lamp should turn ON and OFF when applying and releasing the switch.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the wiper switch.
• 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 wiper switch.
7. If all circuits test normal replace the rear window wiper motor.
Rear Wiper Malfunction without CD4
1. Ignition OFF, disconnect the harness connector at the rear windshield wiper motor.
2. Test for less than 1ohm between the ground circuit terminal 4 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
4. Place the rear wiper switch in the ON position, verify that a test lamp illuminates between the control circuit terminal 2 and ground.
• If the test lamp does not illuminate, test the control circuit for an open/high resistance. If the circuit tests normal replace the wiper switch.
5. Place the rear wiper switch in the OFF position. Place the front windshield wiper switch in the Intermittent position, verify that a test lamp illuminates between the control circuit terminal 3 and ground.
• If the test lamp does not illuminate, test the control circuit for an open/high resistance. If the circuit tests normal replace the wiper switch.
6. If all circuits test normal replace the rear window wiper motor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Windshield Wiper and Washer Switch Replacement (Service and Repair)
* Rear Window Wiper Motor Replacement (Rear Window Wiper Motor Replacement)