Grand Prix V6-191 3.1L (1989)
Tail Lamp: Customer Interest
Tail Lamps - Water Inside Housing
Bulletin Number:
90-10-44
Reference Number:
031043
Publish Date:
11/90
Subject:
CONDENSATION/WATER IN TAIL LAMPS (NEW SERVICE PROCEDURE)
Models
Affected:
1988-90 GRAND PRIX MODELS
This bulletin cancels and replaces bulletins 88-10-34 issued 6/88, 89-10-28 issued 7/89 and 90-10-6 issued 11/89, 88-10-34A issued 11/88.
CONDITION:
Some 1988, 1989, and 1990 Pontiac Grand Prix tail lamps may exhibit condensation or water inside the lamp housing.
CAUSE:
There are two possible causes for the condition:
1.
Certain atmospheric conditions which include cool evenings after humid days, and washing the vehicle during warm humid days may cause
condensation on the inside of the lens. These conditions allow warm humid air to enter the lamp assembly, and the moisture in the air will
condense on the lens when the lens is cooled from the outside.
2.
A poor seal between the lamp housing and the lens may let liquid water enter. Heat from the bulbs in the lamp may evaporate some of the water,
which will then condense on the lens.
CORRECTION:
The lamps have been equipped with a water management system which includes provisions for draining on all lamps. Some
lamps were also equipped with vents in order to provide a way for the moisture which is evaporated by normal use of the
lamps to escape.
IMPORTANT:
SMALL AMOUNTS OF CONDENSATION IN THE LAMPS SHOULD CLEAR WITH NORMAL USE OF THE
LAMPS.
Customer comments regarding moisture or water in the lamps should be addressed by performing the following procedure. This procedure requires the
use of the lamp resealing/venting kit, P/N 10193801. One kit is necessary for each lamp.
NOTE:
THIS PROCEDURE ALSO CONTAINS INFORMATION THAT MAY BE USED WHEN REPLACEMENT OF ONLY THE
OUTER LENS OF THE LAMP ASSEMBLY IS NECESSARY (DUE TO COLLISION OR SIMILAR DAMAGE). IN THIS CASE,
A NEW SEAL MATERIAL IS AVAILABLE AS P/N 10193836.
1.
Remove the lamp assembly from the vehicle.
