Front Wiper Switch Input Short-BCM

FRONT WIPER SWITCH INPUT SHORT-BCM





For a complete wiring diagram Consult Diagrams/Electrical





Diagnostic Test

1. VERIFY SWITCH VOLTAGE
Turn the ignition on.
With the scan tool, select Body, Body Controller and read the Front Wiper Switch volts?
Is the voltage above 0.3 volt?

Yes

- Go To2

No

- Go To3

2. INTERMITTENT WIRING PROBLEM
Turn the ignition on.
With the scan tool, erase all BCM DTCs.
Turn the ignition off.

NOTE: Visually inspect the related wiring harness and circuits. Look for any chafed, pierced, pinched, or partially broken wires.

NOTE: Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

NOTE: Search for any Technical Service Bulletins (TSB) that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

No

- Test Complete.

3. (W52) FRONT WIPER SWITCH MUX CIRCUIT SHORTED TO GROUND




Turn the ignition off.
Disconnect the Wiper/Washer Switch harness connector.
Disconnect the BCM C5 harness connector.
Measure the resistance of the (W52) Front Wiper Switch MUX circuit between the BCM C5 harness connector and ground.
Is the resistance below 1000.0 ohms?

Yes

- Repair the (W52) Front Wiper Switch MUX circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

No

- Go To4

4. (W52) FRONT WIPER SWITCH MUX CIRCUIT SHORTED TO (G902) M/F MUX RETURN CIRCUIT
Turn the ignition off.
Disconnect the Wiper/Washer Switch harness connector.
Disconnect the BCM C5 harness connector.
Measure the resistance between the (W52) Front Wiper Switch MUX circuit and the (G902) Multi-Function Switch MUX Return circuit.
Is the resistance below 1000.0 ohms?

Yes

- Repair the (W52) Front Wiper Switch MUX circuit for a short to the (G902) Multi-Function Switch MUX Return circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

No

- Go To5

5. BODY CONTROL MODULE
Turn the ignition off.
Disconnect the Wiper/Washer Switch harness connector.
Turn the ignition on.
With the scan tool, read the Front Wiper Switch volts?
Is the voltage above 4.5 volts?

Yes

- Replace the Wiper/Washer Switch.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

No

- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test