Pinpoint Test A: Both High Beams Are Inoperative

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

A1 CHECK THE HIGH BEAM INDICATOR
- Ignition ON.
- Place the headlamp switch in the HEADLAMPS ON position.
- Place the multifunction switch in the HIGH BEAM position.
- Does the high beam indicator illuminate?
- Yes: VERIFY the SJB fuse 23 (15A) is OK. If OK, GO to A5. If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short.
- No: GO to A2 .
A2 CHECK FOR A VOLTAGE SIGNAL TO THE MULTIFUNCTION SWITCH
- Place the headlamp switch in the OFF position.
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Measure the voltage between the multifunction switch C202-6, circuit CLF02 (GY/BN), harness side and ground.
  
  Fig 1: Measuring Voltage Between Multifunction Switch C202-6, Circuit CLF02 (GY/BN), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Ignition ON.
- Is the voltage greater than 10 volts?
- Yes: GO to A3 .
- No: GO to A4.
A3 BYPASS THE MULTIFUNCTION SWITCH
- Connect a fused jumper wire between the multifunction switch C202-6, circuit CLF02 (GY/BN), harness side and the multifunction switch C208-8, circuit GD114 (BK/BU), harness side.
  
  Fig 2: Connecting Fused Jumper Wire Between Multifunction Switch C202-6, Circuit CLF02 (GY/BN) And C208-8, Circuit GD114 (BK/BU)
  Courtesy of FORD MOTOR CO.
- Place the headlamp switch in the HEADLAMPS ON position.
- Do the high beams illuminate?
- Yes: REMOVE the jumper wire. INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
- No: REMOVE the jumper wire. REPAIR circuit GD114 (BK/BU) for an open.
A4 CHECK THE HIGH BEAM REQUEST CIRCUIT FOR AN OPEN
- Disconnect: SJB C2280b.
- Measure the resistance between the multifunction switch C202-6, circuit CLF02 (GY/BN), harness side and the SJB C2280b-27, circuit CLF02 (GY/BN), harness side.
  
  Fig 3: Checking High Beam Request Circuit For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A6.
- No: REPAIR circuit CLF02 (GY/BN) for an open. TEST the system for normal operation.
A5 BYPASS THE SJB
- Disconnect: SJB C2280e.
- Connect a fused jumper wire between the SJB C2280e-1, circuit CDC34 (WH/OG), harness side and the SJB C2280e-2, circuit CLF08 (YE/VT), harness side.
  
  Fig 4: Connecting Fused Jumper Wire Between SJB C2280E-1, Circuit CDC34 (WH/OG) And C2280E-2, Circuit CLF08 (YE/VT), Harness Side
  Courtesy of FORD MOTOR CO.
- Ignition ON.
- Do the high beams illuminate?
- Yes: REMOVE the jumper wire. GO to A6 .
- No: REMOVE the jumper wire. REPAIR circuit CLF08 (YE/VT) for an open. TEST the system for normal operation.
A6 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - damaged pins
  - 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.