Pinpoint Test A: The Low Beams Are Inoperative

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK CIRCUIT 1231 (RD/WH) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280a.
- Measure the voltage between the SJB C2280a-29, circuit 1231 (RD/WH), harness side and ground.
  
  Fig 1: Measuring Voltage Between SJB C2280a-29, Circuit 1231 (RD/WH), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to A2.

No: VERIFY the BJB fuse 18 (40A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
A2 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new SJB. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.