Pinpoint Test A: Both Headlamps Are Inoperative
WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
- A1 CHECK THE HEADLAMP SWITCH OUTPUT
- Key in OFF position.
- Connect the diagnostic tool.
- Key in ON position.
- Monitor the instrument cluster headlamp switch status PID while rotating the knob to the headlamps ON position.
- Does the PID match the headlamp switch position?
- A2 CHECK THE HEADLAMP SWITCH
- Key in OFF position.
- Disconnect: Headlamp Switch C205.
- Carry out the headlamp switch component test. Refer to COMPONENT TESTING for component testing.
- Is the headlamp switch OK?
- Yes : GO to A3.
- No : INSTALL a new headlamp switch. REFER to HEADLAMP SWITCH in this article. TEST the system for normal operation.
- A3 CHECK INSTRUMENT CLUSTER OPERATION
- Key in OFF position.
- Disconnect all instrument cluster connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all instrument cluster 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 instrument cluster. REFER to INSTRUMENT CLUSTER . 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.
- A4 CHECK FEM OPERATION
- Key in OFF position.
- Disconnect all FEM connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all FEM 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 FEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . 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.