Wipers High Speed Inoperative

WIPERS HIGH SPEED INOPERATIVE

Wipers High Speed Inoperative:

POSSIBLE CAUSES
- Multi-function switch
- Body control module
- Wiper motor

DIAGNOSTIC TEST

1. TEST THE WIPER MOTOR





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

Turn the ignition off.
Disconnect the Body Control Module (BCM) C2 harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Connect a jumper wire between cavity 1 of the BCM C2 harness connector and B(+).
Connect a jumper wire between cavity 41 of the BCM C2 harness connector and ground.
With the jumper wires connected, does the Wiper Motor move?

YES: Go to 2
NO: Replace the Wiper Motor. Perform BODY VERIFICATION TEST. Body Verification Test

2. MEASURE WIPER SWITCH MUX CIRCUIT VOLTAGE




Disconnect the BCM harness connector.
Turn the ignition on.
Measure the BCM C3 harness connector cavity 65 for voltage with the Wiper Switch in the High position.

Q: Is the voltage approximately 12 volts?

YES: Replace the Body Control Module. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Replace the Multi-Function Switch. Perform BODY VERIFICATION TEST. Body Verification Test