Component Tests and General Diagnostics

Multi-Function Lever Switch and Harness Test

Front wiper switch continuity test:

To check the multi-function switch and harness from the switch to the wiper motor; remove the connector from the wiper motor, and measure the voltages from the connector pins to ground using a volt-ohmmeter. Place the ignition switch in run, and check the operation of the switch in the different modes. Refer to the Image for the proper operating parameters for the different switch modes. If the switch does not produce the voltages given in the Image, remove the connector from the switch, and check for the proper voltage at the switch. If the proper voltage cannot be obtained at the switch, check for power to the switch. If there is power to the switch, then replace the switch.

If the voltages at the switch are correct, then locate and repair the short or open in the wiring harness between the switch, and the motor.