Left High Beam Headlight Circuit Shorted To Ground
NOTE:
After making any repairs, perform BODY VERIFICATION TEST
under VERIFICATION TESTS.
- Turn ignition on. Using scan tool, clear all Front Control Module (FCM) DTCs. Turn headlights on and cycle headlights between high and low beams several times, pausing at least 5 seconds between each position. Recheck for DTCs. If LEFT HIGH BEAM HEADLIGHT CIRCUIT SHORTED TO GROUND resets, go to next step. If LEFT HIGH BEAM HEADLIGHT CIRCUIT SHORTED TO GROUND does not reset, conditions necessary to set this DTC are not present at this time. Check for intermittent poor connections or faulty circuits and repair as necessary.
- Turn ignition off. Remove left headlight assembly and disconnect left headlight connector. Remove FCM from Intelligent Power Module (IPM). See FRONT CONTROL MODULE under REMOVAL & INSTALLATION. Using DVOM, measure resistance between ground and left headlight connector terminal No. 3 (White/Light Green wire). If resistance is greater than 100 ohms, go to next step. If resistance is 100 ohms or less, repair short to ground in White/Light Green wire between FCM and left headlight.
- Reconnect FCM. Replace left headlight bulb with a known-good bulb. Turn ignition on. Turn headlights on and cycle headlights between high and low beams several times, pausing at least 5 seconds between each position. Monitor FCM DTCs on scan tool. If LEFT HIGH BEAM HEADLIGHT CIRCUIT SHORTED TO GROUND resets, go to next step. If LEFT HIGH BEAM HEADLIGHT CIRCUIT SHORTED TO GROUND does not reset, replace left headlight bulb.
- Check for poor connections or faulty circuits for left high beam headlight. Repair as necessary. If connectors and circuits are okay, replace FCM.