Wipers Run Continuously With Ignition on

WIPERS RUN CONTINUOUSLY WITH IGNITION ON

Wipers Run Continuously With Ignition On:

POSSIBLE CAUSES
- Multi-function switch
- Wiper motor circuit short to voltage
- Body control module

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.

Q: 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.

Q: 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