The 2002 Grand Prix came with a safety reality established as anti-lock brakes. Anti-lock brakes employment odd sensors on the wheels that dossier and calculate circle rush. These sensors Announcement to the leading anti-lock brake module and at last detain the brakes from locking provided they are applied suddenly or in damaging driving conditions. These sensors are connected to the rotate, or to the brake meeting on the wheels. If the test light comes on, it means the wiring harness is good and that the problem is with the actual speed sensor itself.
Instructions
1. Drive the Grand Prix to an auto parts store and have a diagnostic test run to determine which wheel sensor is triggering the ABS warning light. The diagnostic is free and does not take long.
2. Have the attendant run the trouble codes from the diagnostic test through the computer system. This will pinpoint the faulty wheel sensor, and may be able to tell you whether the sensor itself is bad or whether there is an electrical short in the wiring system.
3. Bring the vehicle home and use a jack to jack up the wheel where the faulty wheel sensor is. Lower the vehicle onto a jack stand.
4. Use a lug wrench to remove the lugs and wheel.
5. Slide underneath the Grand Prix and disconnect the plastic wiring harness from the sensor. To disconnect the harness, squeeze in on the two tabs on each side and then pull it out firmly.
6. Connect the test light sensors to the plastic wiring harness. Wires dart from the sensors to the ABS check module via a plastic wiring harness. If the ABS warning light goes off on the dash, first the wheel that is giving the warning has to be identified. Once you do that, the wiring harness and the sensor need to be checked.
