Wipers Run Continuously With Ignition On

*WIPERS RUN CONTINUOUSLY WITH IGNITION ON









Diagnostic Test

1. MEASURE WIPER SWITCH MUX CIRCUIT VOLTAGE

NOTE: If any BCM DTCs are set, diagnose them first before continuing.





Disconnect the BCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Turn the ignition on.

Measure the voltage of the Wiper Switch MUX circuit at cavity 65 of the BCM harness connector.

Is voltage present?

Yes

- Go to 2

No

- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST. Body Verification Test

2. MEASURE MULTI-FUNCTION SWITCH VOLTAGE





Turn the ignition off.

Disconnect the Multi-Function Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Turn the ignition on.

Measure the voltage of the Wiper Switch MUX circuit at cavity 7 of the Multi-Function Switch harness connector.

Is voltage present?

Yes

- Repair the Wiper Switch MUX circuit for a short to voltage.
- Perform BODY VERIFICATION TEST. Body Verification Test

No

- Replace the Multi-Function Switch.
- Perform BODY VERIFICATION TEST. Body Verification Test