ABS LIGHT COMES ON W/CODE 25 REROUTE SPEED SENSOR WIRE

Subject: ABS LIGHT ON

Model and Year: 1991 CAPRICE SEDAN

Condition: ABS light comes on with 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.

Correction: To improve this clearance, the speed sensor wire bracket was moved on the frame to allow more clearance from the plug wires. This is on all vehicles built after VIN #MW187731.

To obtain more clearance on vehicles built prior to this, reroute the wheel speed sensor wire through the bracket on the frame so that it enters the bracket from the front of the vehicle instead of the rear.

Do not use the clip which is attached to the inner fender just below the connector. instead, attach the sensor wire to the relay center harness with a tie wrap as shown in the illustration of the revised routing. Position the wire through the bracket to obtain at least 4 inch clearance from the spark plug wires.

Labor Operation Number: T 1695

Labor Time : 0.3 Hours

Trouble Code: 92

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.