Headlamp Lens - Distortion Caused by Aiming Equipment
File In Section: 8 - Chassis/Body ElectricalBulletin No.: 63-81-11
Date: April, 1996
INFORMATION
Subject:
Headlamp Lens Distortion Caused by Headlamp Aiming Equipment
Models:
1996 and Prior Passenger Cars and Trucks
with Plastic Headlamp Lenses
When using headlamp aiming equipment which attaches to the headlamp assembly with a suction cup type device, DO NOT LEAVE THE LAMPS ON while the equipment is attached. On vehicles with "plastic" headlamps (body styled composite or sealed beam), having the head lamps illuminated when the equipment is attached may cause heat to build-up between the plastic headlamp lens and the suction cup. This heat build-up, combined with the suction cup, may cause the plastic headlamp lens to become distorted, requiring lamp replacement.
Many aftermarket parts suppliers currently offer replacement headlamps made of plastic for past model vehicles which were originally equipped with headlamps made of glass. As a result, you may encounter vehicles that have a mix of both glass and plastic headlamp assemblies.
Notice:
In order to avoid any possibility of damage, regardless of whether a vehicle has glass or plastic headlamps, it is recommended that the headlamps not be illuminated when using headlamp aiming equipment which uses a suction cup device for attachment.
On vehicles with concealed headlamps, follow the instructions in the Owner's Manual on how to keep the headlamp doors open and the headlamps not illuminated.