Pinpoint Test G: The Headlamps Do Not Illuminate When The Wipers Are On
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
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.
- 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 in this service information. CLEAR the DTCs. REPEAT the self-test.
- No : GO to G2.
- 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.
- 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 MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. 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.