Wiper Switch: Testing and Inspection

See Wiper System and/or Washer System in the Diagnosis and Testing before testing the multi-function switch.

For additional testing and inspection information please refer to Powertrain Management/Computers and Control Systems/ Body Control Module

WARNING: ON VEHICLES EQUIPPED WITH AN AIRBAG, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Disconnect and isolate the battery negative cable.
2. Unplug the multi-function switch wire harness connector from the multi-function switch.

Multi-Function Switch Continuity:

3. Using an ohmmeter, perform the switch continuity checks at the switch terminals as shown in the Multi-Function Switch Continuity chart.
4. If the switch fails any of the continuity checks, replace the faulty switch. If the switch is OK, repair the wiper system and/or washer system wire harness circuits as required.