GM Service Manual Online
For 1990-2009 cars only

TEMPERATURE WARNING LIGHT(UF7) GLOWS DIMLY ON WARM ENGINE

VEHICLES AFFECTED: 1988 CHEVROLET "A" CAR WITH GAUGE CLUSTER (UF7)

Condition: On some 1988 Chevrolet "A" cars with optional gauge cluster (UF7), a temperature warning light is used in addition to the gauge. On some early built vehicles this warning light may glow dimly when the engine reaches normal operating temperature.

Cause: A wire may be incorrectly connected under the dash. This wire should only be connected on cars with standard warning lights. This wire supplies a second ground path to the light, causing a dim glow.

Repair: 1. Remove glove box.

2. Disconnect single wire at connection just above glove box opening. This wire is green on one side of the connection, and green/white stripe on the other.

3. Reinstall glove box.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.