Pinpoint Test M: The Exterior Lamps Are Inoperative

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

M1 CHECK THE HEADLAMP SWITCH
- Key in OFF position.
- Disconnect: Headlamp Switch C205.
- Carry out the headlamp switch component test.
  Refer to the appropriate SYSTEM WIRING DIAGRAMS for schematic and connector information.
- Is the headlamp switch OK?
1. Yes : GO to M2.
2. No : INSTALL a new headlamp switch. REFER to LAMP SWITCH - HEADLAMP . TEST the system for normal operation.
M2 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between the headlamp switch C205 pin 5, circuit 57 (BK), harness side and ground.
  
  Fig 1: Checking Circuit 57 (BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes : GO to M3.
2. No : REPAIR the circuit. TEST the system for normal operation.
M3 CHECK CIRCUIT 1032 (WH/BK) FOR AN OPEN
- Measure the voltage between the headlamp switch C205 pin 3, circuit 1032 (WH/BK), harness side and ground.
  
  Fig 2: Checking Circuit 1032 (WH/BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes : GO to M4.
2. No : REPAIR the circuit. TEST the system for normal operation.
M4 CHECK FOR CORRECT SJB OPERATION
- Key in OFF position.
- Disconnect all SJB connectors.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect all SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. Yes : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . TEST the system for normal operation.
2. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector.