Pinpoint Test B: The High Beams Are Inoperative: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK THE MULTIFUNCTION SWITCH INPUT
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: SJB Multifunction Switch PID.
- Monitor the SJB multifunction switch high beam status PID while placing the multifunction switch in the HIGH BEAM position.
- Does the PID agree with the multifunction switch position?
- Yes : VERIFY the SJB fuse 1 (20A) is OK. If OK, GO to B5.
- No : GO to B2.
B2 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202a.
- Connect a fused (5A) jumper wire between the multifunction switch C202a-8, circuit 1708 (LG/BK), harness side and the multifunction switch C202a-10, circuit 1205 (BK), harness side.
  
  Fig 1: Checking Multifunction Switch
  Courtesy of FORD MOTOR CO.
- Key in ON position.
- Do the high beam illuminate?
- Yes : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
- No : REMOVE the jumper wire. GO to B3.
B3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the multifunction switch C202a-10, circuit 1205 (BK), harness side and ground.
  
  Fig 2: Checking Circuit 1205 (BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to B4.
- No : REPAIR the circuit. TEST the system for normal operation.
B4 CHECK CIRCUIT 1708 (LG/BK) FOR AN OPEN
- Disconnect: SJB !280d.
- Measure the resistance between the multifunction switch C202a-8, circuit 1708 (LG/BK), harness side and the SJB C2280d-28, circuit 1708 (LG/BK), harness side.
  
  Fig 3: Checking Circuit 1708 (LG/BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to B6.
- No : REPAIR the circuit. TEST the system for normal operation.
B5 CHECK CIRCUIT 1337 (VT/YE) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280a.
- Connect a fused (20A) jumper wire between the SJB C2280a-29, circuit 1231 (RD/WH), harness side and the SJB C2280a-23, circuit 1337 (VT/YE), harness side.
  
  Fig 4: Checking Circuit 1337 (VT/YE) For Open
  Courtesy of FORD MOTOR CO.
- Do the high beams illuminate?
- Yes : GO to B6.
- No : REPAIR the circuit. TEST the system for normal operation
B6 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 MULTIFUNCTION ELECTRONIC MODULES . 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. CLEAR the DTCs. REPEAT the self-test.