Lighting - One Xenon Headlamp Flickers Or Goes Out
94 Headlight, low beam may not work94 10 20
2013829/10
June 7, 2010
Supersedes Technical Service Bulletin Group 94 number 09-20 dated August 4, 2009 for reasons listed below.
Affected Vehicles
Condition
There are two separate conditions that both occur in vehicles with Bi-xenon, with or without Adaptive Lighting (AFS). The conditions are:
^ One xenon light on either side sporadically flickers or flashes and goes out. When the headlamps are turned off and on again or at ignition cycle, the headlamps may function properly or exhibit the same behavior.
^ One xenon light on one side fails permanently.
Technical Background
If one xenon light sporadically flickers:
The xenon bulb may have reached its expected lifetime, or the bulb may fail due to harsh driving conditions such as rough roads.
If one xenon light on one side fails permanently:
The headlamp may fail permanently due to hardware issues in the High-intensity Gas Discharge Lamp Control Module.
Production Solution
If one xenon light sporadically flickers:
Not applicable.
If one xenon light on one side fails permanently:
The High-Intensity Gas Discharge Lamp Control Modules for xenon lights was improved.
Service
If one xenon light sporadically flickers:
Inspect and if necessary replace the Gas Discharge Bulb.
This bulb will be covered under LNVW due to consequential damage.
If one xenon light on one side fails permanently:
1. Swap the Gas Discharge Bulbs from left to right. For vehicles that require bumper removal, check the headlamp functionality before reinstalling the bumper; removal and reinstallation of bumper cannot be claimed twice for this TSB.
2. If the failure moves with the xenon bulb, replace the bulb.
3. If the condition remains on the original side, remove the High-Intensity Gas Discharge Lamp Control Module, and check the pins and terminals for damage.
4. If there is no further damage found, the faulty control module and bulb must be replaced.
This bulb will be covered under LNVW due to consequential damage.
Tip: If no fault is found in the wiring harness inside of the headlamp assembly, replacement of the headlight assembly will not guarantee a successful repair and is not permitted.
Warranty
Required Parts and Tools
Order the high-intensity gas discharge lamp control module or xenon light bulb as necessary according to the VIN.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.his TSB are subject to change and/or removal.