NO BLOWER SPEED CHANGE LOW TO MED (CORRECTED WIRING)

VEHICLES AFFECTED: ALL 89-90 PONTIAC "J", ALL 90 CHEVROLET "J", 88-89 PONTIAC "N" 2.0L TURBO, ALL W/C41

CONDITION:

There have been some customer comments of no medium blower speed on standard heater (C-41) equipped vehicles. The blower functions normally on high speed but there is no apparent difference in air flow between low and medium speed.

CAUSE:

The 51 circuit and the 52 circuit wires at the blower motor resistor, cavities D and B, are reversed.

CORRECTION:

Refer to service manual 8A-60-0 for proper wiring procedure.

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.