Lighting - Condensation in Tail Lamp Assemblies
No.: LTB00087Issue: 3
Date: November 13, 2007
THIS BULLETIN SUPERCEDES LTB00087, ISSUE 2, DATED 23 OCT 2007. UPDATED INFORMATION IS SHOWN WITH ASTERISKS.
SECTION: 417-00
Tail Lamp Condensation
AFFECTED VEHICLE RANGE:
New Range Rover (LM) 3A101029 - Onwards
CONDITION SUMMARY:
CONDENSATION OR WATER INGRESS INTO TAIL LAMPS
Situation:
A customer may report a concern of misting evident on the inside of the tail lamp lens. The misting is generally caused by natural condensation and can be expected under certain atmospheric conditions. However, water can also enter the lamp via the breather tube under extreme conditions.
Action:
Upon customer complaint of tail lamp water ingress refer to the Service Procedure detailed in this bulletin.
PARTS INFORMATION
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.
REPAIR PROCEDURE
INSPECT FOR CONDENSATION
NOTE:
Normal condensation is a natural process. Range Rover tail lamps are vented to alleviate changes in pressure through a breather vent.
^ Atmospheric air contains water vapor referred to as humidity. When this air enters the tail lamp under any circumstance, there is a possibility that condensation can occur if the temperature is cold enough.
^ When normal condensation occurs, a thin film of mist can form on the inside surface of the plastic lens. The thin mist will clear and exit through the vents during normal lamp operation.
1. If condensation is reported, determine if it dissipates during a 30-minute period of normal tail and fog lamp operation as the lamp heats up.
2. If considerable water droplets remain at unacceptable levels on the inside of the lamp lens at the end of 30 minutes (Figures 1-4), replace the lamp with the latest configuration.
3. If there is evidence of standing water within the lamp unit, replace the lamp with the latest configuration.
NOTE:
GTR lookup sequence is as follows:
GTR Home> NAS > Service Information/LM New Range Rover/2005 > Workshop Manuals> Range Rover Workshop Manual - Service Procedures> Bookmark "86-2 LIGHTING" > Link "86.40.70 Lamp assembly - tail"
4. If the complaint of unacceptable condensation/water contamination is confirmed, refer to GTR section 86.40.70 and replace the affected tail lamps.