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.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, verify wiper motor operation in all switch positions.

Wiper Motor Switch Circuit Test

1. Disconnect the X202, harness connectors at the windshield wiper switch.
2. Ignition ON, test for 11.0-13.0 volts between the 12-volt reference circuit terminal N and ground.

⇒	If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to Wiper Motor/Module Circuit Test.

3. Install a 3A fused jumper wire between the signal circuit terminal H and the 12-volt reference circuit terminal N. Ignition ON, verify the wiper motor operates in the wash mode.

⇒	If the wiper motor does not operate, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, refer to Wiper Motor/Module Circuit Test.

4. Install a 3A fused jumper wire between the signal circuit terminal K and ground. Ignition ON, verify the wiper motor operates in the high speed mode.

⇒	If the wiper motor does not operate, test the signal circuit for an open/high resistance. If the circuit tests normal, refer to Wiper Motor/Module Circuit Test.

5. If all circuits test normal, replace the turn signal/multifunction switch.

Wiper Motor/Module Circuit Test

1. Ignition OFF, disconnect the harness connector at the windshield wiper motor cover.
2. Test for less than 1.0 ohm between the ground circuit terminal D and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Remove the wiper motor cover.
5. Connect the harness connector at the windshield wiper motor cover.
6. Connect a test lamp between the circuit board terminals T1 and T3.
7. Ignition ON, wiper switch in low, verify the test lamp turns on for 15 seconds.

⇒	If the test lamp does not turn on, replace the wiper motor cover.

8. If all circuits test normal, replace the windshield wiper motor.

1. Ignition OFF, disconnect the harness connectors at the winshield wiper switch.
2. Test the resistance between terminals N and K. Rotate the wiper switch and compare the resistance readings to the values in the Windshield Wiper Switch Values table below for WASH, MIST, each DELAY and LOW speed.

⇒	If the resistance is not within the specified range, replace the turn signal/multifunction switch.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.