ABS SENSOR LIGHT COMES ON (REROUTE SPEED SENSOR WIRE)

SUBJECT: ABS LIGHT ON (REROUTE WHEEL SPEED SENSOR WIRE AROUND ECU WIRING HARNESS)

VEHICLES AFFECTED: 1992 "B" CAR SEDANS

Condition:

---------- On some vehicles the ABS light comes on and stores Code #25 (left front wheel speed sensor fault) and Code #35 (rear axle speed sensor fault).

Cause:

------ A voltage may be induced in the right front wheel sensor wire if it is too close to the spark plug wires. This may occur on vehicles between the following breakpoints:

Buick - NR421429 THRU NR429876

Chevrolet - NR100004 THRU NR108859

Correction:

----------- To obtain more clearance on these vehicles, reroute the wheel speed sensor wire around the ECU wiring harness below the front of dash panel clamp, per Figure 1.

For vehicles being repaired under warranty use:

Labour Time: .4 Hours

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.