You are here:

Pontiac Repair/2002 Grand am


QUESTION: I have a 2002 grand am 4 cylinder and my abs light service engine soon light and traction control light are on have changed both front wheel bearings and both wringing harness I bought skf bearings from napa and when it is put on a snapon scanner the scanners reads open circuit on right side did I get bad wheel bearing or is there something else can you help?

ANSWER: Hi Clyde:

wheel bearings are VERY common on these cars so are the wheel speed harness's if you just put a short jumper harness on it chance are the harness is damaged further up into the body harness beyond where you put a new connector on it. Usually the harness is bad right along where control arm meets the sub frame the harness flexes most right there. that is a good brand of part. If you want to check the new bub to be sure the wheel speed harness resistance should be between 800-1400 Ohms if you have a digital ohm meter. Good luck!

---------- FOLLOW-UP ----------

QUESTION: When I replaced the wheel speed harness I went all the way up into where the wire splice into the main harness just below that  so should I test the bearing or the harness it self or I guess what I am saying is do I unplug bearing and check it for ohms or do I check the wire coming from module.

check the resistance of the sensor in the hub first. then unplug the module and jumper the 2 wires at the bub and check the ckts at the module  I'm sure you can google the harness connector at the abs module to fine the correct ckts to test if you jumper the 2 ckys together with say a paper clip put the ohm meter on the 2 ckts at the module connector you should have a complete ckt with very little resistance say under 2 ohms if it' OL or has much more then 2 or 3 ophms you have high resiatnce OL is an open ckt.  

Pontiac Repair

All Answers

Answers by Expert:

Ask Experts


Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

©2017 All rights reserved.