Diagnostic Test

1) MEASURE MULTI-FUNCTION SWITCH RESISTANCE

Fig 1: Measuring Multi-Function Switch Resistance
Courtesy of DAIMLERCHRYSLER CORP.

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

Disconnect the BCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Disconnect the Multi-Function Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Turn the ignition on.

Measure the voltage of the Washer Pump Motor Control circuit at cavity 8 of the Multi-Function Switch harness connector.

Is voltage present?

Yes
1. Repair the Washer Pump Motor Control circuit for an open.
2. Perform BODY VERIFICATION TEST .
No
1. Go to step 2).
2) MEASURE MULTI-FUNCTION SWITCH RESISTANCE

Fig 2: Measuring Multi-Function Switch Resistance
Courtesy of DAIMLERCHRYSLER CORP.

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

Turn the ignition off.

Disconnect the Multi-Function Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance of the Multi-Function Switch between cavity 8 and cavity 11.

While measuring the resistance, depress the washer switch once and release.

Did the resistance reading go from infinite to less than 5 ohms to infinite?

Yes
1. Replace the Body Control Module. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/BODY CONTROL/CENTRAL TIMER MODULE - REMOVAL)
2. Perform BODY VERIFICATION TEST .
No
1. Replace the Multi-Function Switch. (Refer to ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/MULTI-FUNCTION SWITCH - REMOVAL)
2. Perform BODY VERIFICATION TEST .