Pinpoint Test G: The Headlamps Do Not Illuminate When The Wipers Are On

Wipers and Washers

Pinpoint Tests

Pinpoint Test G: The Headlamps Do Not Illuminate When the Wipers are On

Refer to Wiring Diagram Set 81 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Front Wipers and Washers for schematic and connector information. Diagrams By Number

Normal Operation

The Smart Junction Box (SJB) sends a 12 volt reference signal on circuit CRW01 (WH) to the wiper motor module in order to monitor the status of the wipers. When the headlamp control switch is in the AUTOLAMP position and the wipers are on, the wiper motor module will pull the voltage reference signal low. After 3 seconds, the SJB will activate the headlamps.

- DTC B2008 (Wipers On Signal Circuit Short to Ground) - Sets when a short to ground is detected on the wiper motor status input circuit.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wiper/washer module
- SJB



PINPOINT TEST G: THE HEADLAMPS DO NOT ILLUMINATE WHEN THE WIPERS ARE ON

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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G1 CHECK WIPER ON SIGNAL FOR VOLTAGE


- Disconnect: Wiper/Washer Module C2157.
- Ignition ON.
- Measure the voltage between wiper/washer module C2157-2, circuit CRW01 (WH), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
INSTALL a new wiper/washer module. REFER to Wiper/Washer Module Service and Repair. CLEAR the DTCs. REPEAT the self-test.

No
GO to G2.

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G2 CHECK WIPER ON SIGNAL FOR AN OPEN OR SHORT TO GROUND


- Ignition OFF.
- Disconnect: SJB C2280F.
- Measure the resistance between SJB C2280F-8, circuit CRW01 (WH), harness side and wiper/washer module C2157-2, circuit CRW01 (WH); and between SJB C2280F-8, circuit CRW01 (WH), harness side and ground.




- Is the resistance less than 5 ohms between the SJB and wiper/washer module and greater than 10,000 ohms between the SJB and ground?

Yes
GO to G3.

No
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

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G3 CHECK FOR CORRECT MODULE OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all the SJB connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. REFER to Body Control Systems. CLEAR the DTCs. REPEAT the self-test.

No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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