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

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.
  
  Fig 1: Measuring Voltage Between Wiper/Washer Module C2157-2, Circuit CRW01 (WH) And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  - Yes: INSTALL a new wiper/washer module. REFER to Wiper/Washer Module . 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.
  
  Fig 2: Checking Wiper On Signal For Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- 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 . 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.