Lighting - Headlamp Condensation Information
No: LTB00127Issue: 1
Date: 07 AUG 2008
SECTION: 417
Headlamp Condensation - Inspection and Repair Procedure
AFFECTED VEHICLE RANGE:
Range Rover (LM) VIN: 6A194480 - Onwards
Model Year: 2006 - Onwards
CONDITION SUMMARY:
Situation:
Natural condensation, normally a thin mist, may occur under certain atmospheric conditions within the headlamps. This is normally caused by air humidity condensing on the inner surfaces of the headlamp lens, generally in cold weather. The mist will usually clear by exiting through the breather tubes as the headlamps warm up after 30 minutes of normal, low-beam operation.
NOTE:
Refer to the illustrations in "Examples of headlight condensation not covered by warranty" in this bulletin for guidance on acceptable misting conditions before proceeding with any repair.
Action:
In the event of a customer concern that considerable water droplets remain on the inside of the headlamp lens or if there is evidence of standing water within the headlamp unit, refer to the following Inspection and Repair Procedure outlined below and replace the headlamp unit(s) as necessary.
PARTS
WARRANTY:
NOTE:
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
INSPECTION AND REPAIR PROCEDURE
INSPECT FOR WATER DROPLETS
WARNING:
Vehicles with Xenon headlamps: Should it be necessary to replace the headlamp, the following precautions must be observed.
^ Failure to comply may result in exposure to ultra violet rays, severe electric shock, burns or the risk of explosion.
^ Ensure the headlamps are switched off at all times.
^ Eye and hand protection must be worn.
^ Never switch on the headlamps or test the bulbs with the lamp holder released from the headlamp.
1. Switch the headlamps 'ON' (low beam).
2. Start and run the engine for 30 minutes.
3. Inspect for water droplets or mist in headlamps.
NOTE:
Incorrect replacement of bulb-covers following bulb replacement or blockage of the breather tubes can lead to condensation forming.
4. If water droplets remain on the inside of the headlamp glass:
^ Inspect the bulb-covers for proper installation; correct as necessary.
^ Verify breather tubes are not blocked; replace as necessary.
5. If bulb covers or breather tubes required attention, measures should be taken to dry out the headlamp(s).
NOTE:
Global Technical Reference (GTR) lookup sequence is as follows: GTR Home > NAS > LM-New Range Rover > Service Information > Model Year > Workshop Manual > 4: Electrical > 417: Lighting
6. If no fault is found with the bulb-cover installation or breather tubes and water droplets remain on the inside of the headlamp(s), the effected headlamp(s) should be replaced.
7. If there is standing water within the headlamp(s), refer to Workshop Manual (GTR) Section: 417-01, Headlamp Assembly, to replace the effected headlamp(s).
8. If there is mist evident on the inside of the headlamp(s), refer to the following page for examples of 'normal' headlamp condensation not covered under warranty.
EXAMPLES OF HEADLAMP CONDENSATION NOT COVERED BY WARRANTY
1. No drip marks / streaks in the finely condensed film on the interior side of the clear plastic lens. (Figure 1)
2. No visible water droplets in the thin mist. (Figure 2)
3. Mist does not obstruct the view of the lamp's interior. (Figure 3)
4. Fine mist that covers less than 50% of the lens. (Figure 4)