Pinpoint Test H: The Headlamps Are Inoperative With AUTOLAMPS On

WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK CIRCUIT 196 (DB/OG) FOR AN OPEN
- Key in OFF position.
- Disconnect: Vehicle Security Module C3008a.
- Measure the voltage between vehicle security module C3008a-1, circuit 196 (DB/OG), harness side and ground.
  
  Fig 1: Measuring Voltage Between Vehicle Security Module C3008a-1, Circuit 196 (DB/OG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to H2.
- No : REPAIR the circuit. TEST the system for normal operation.
H2 CHECK CIRCUIT 15 (RD/YE) FOR AN OPEN
- Place the headlamp switch in the headlamps on position.
- Measure the voltage between vehicle security module C3008a-9, circuit 15 (RD/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between Vehicle Security Module C3008a-9, Circuit 15 (RD/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to H3.
- No : REPAIR the circuit. TEST the system for normal operation.
H3 CHECK FOR CORRECT VEHICLE SECURITY MODULE OPERATION
- Disconnect all vehicle security module connectors.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect all vehicle security module 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 vehicle security module. REFER to MULTIFUNCTION ELECTRONIC MODULES -- F150 PICK . TEST the system for normal operation.
- 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.