Mechanics

INSTRUMENT PANEL DISPLAY

2003 Buick Lesabre

Brakes problem
2003 Buick Lesabre 6 cyl Front Wheel Drive Automatic 65238 miles

THE TRACTION CONTROL, BRAKE AND ABS LIGHTS ON MY LASABRE INSTRUMENT PANEL STAYS ON AFTER INITIALLY STARTING THE VEHICLE. IS THERE A RELAY THAT COULD CAUSE THIS OR IS THE ABS PUMP NOT FUNCTIONING?WHERE WOULD I CHECK TO SEE WHERE THE PROBLEM EXIST?

updated 2-17-09
thank you soo much, I have checked both areas recommended and still can't determine if the abs pump is bad or it is not getting voltage to it.I appreciate your input. All the literature I have is very vaque on fuses and relays in the circuit. Thanks again. Mwb

updated 2-17-09
IN YOUR SUGGESTED BRAKING TEST, " TO LISTEN FOR THE CLICK, CLICK, CLICK", ARE YOU REFERRING TO BRAKING AS IN A PANIC STOP, WHEN THE ABS KICKS IN?I REALLY APPRECIATE YOUR INPUT ON THIS SUBJECT.I RECENTLY HAD SOME BRAKE WORK DONE ON THE CAR(TURNED THE ROTORS)DUE TO A VERY LOUD CHATTERING NOISE WHEN BRAKING. THE REPAIR SHOP THOUGHT THE ROTORS ALTHOUGH NEW NEEDED TURNING AND THE NOISE WENT AWAY EXCEPT FOR A VERY SLIGHT NOISE IF CREEPING TO A STOP. WITH IN A WEEK AFTER THE ROTORS WERE TURNED THE ABS, TRACTION CONTROL AND BRAKE LIGHTS APPEARED ON THE DASH. THE ABS PUMP IS VERY EXPENSIVE THUS MY CONCERN WITH CHANGING THE PUMP WITHOUT KNOWING FOR SURE IT IS THE PROBLEM. VISUALLY CHECKING THE WHEEL SENSORS THEY ARE PLUGGED IN AND THE WIRING LOOKS TO BE IN GOOD CONDITION. THANK YOU AGAIN FOR YOUR TIME AND EFFORTS TO HELP WITH THIS ISSUE

updated 2-19-09
MIKE I HAVE VISUALLY CHECKED THE WHEEL SENSORS, THE CONNECTORS LOOK GOOD, PLUGGED IN SECURELY. THE WIRING APPEARS TO BE IN GOOD CONDITION. HOWEVER I'AM NOT SURE WHERE THE ABS SENSOR (YOU REFERENCE)IS LOCATED, OTHER THAN THE WHEEL SENSORS. THE WIRING REFERENCE I'AM USING IF FROM A HAYNES MANUAL AND IS VERY VAGUE THUS I CAN'T CORRELATE THE CIRCUIT DISPLAY FOR THE TRACTION CONTROL, PARKING BRAKE, AND ABS LIGHTS ON THE DASH. SO NOT SURE OF WHAT SENSORS ARE INVOLVED OTHER THAN THE WHEEL SENSORS. IT LOOKS LIKE THE BACK WHEEL SENSORS ARE THE PRIMARY SOURCE OF INPUT TO THE ABS, TRACTIONS CONTROL CIRCUIT, AND PARKING BRAKE.I TESTED THE ABS SYSTEM FUNCTION VIA A PANIC STOP AND COULD NOT HEAR ANY CLICKING WHICH FROM YOUR NOTE INDICATES A BAD PUMP, WHICH IS THE DIRECTION I'AM LEADING INTO. THANKS AGAIN FOR ALL YOUR ASSISTANCE ON THIS SUBJECT.

3/1/09

I HAVE BEEN UNABLE TO OBTAIN A ABS SCANNER TOOL. ANY ONE THAT HAS ONE WILL NOT RENT IT OR LOAN IT OUT.I DID PERFORM THE PANIC STOP AND DIDN'T HEAR THE CLICKING OF THE ABS KICKING IN SO IT SOUNDS LIKE THE PUMP CIRCUIT IS NOT ACTIVATED OR THE PUMP IS NOT WORKING. SORRY FOR THE DELAY IN RESPONSE BUT HAD A MAIN HOUSE SUPPLY WATER LINE BREAK, WHICH TOOK PRIORITY FOR A FEW DAYS. AND NOT BEING ABLE TO LOCATE A ABS SCANNER TOOL HAS TAKEN SOME TIME.I APPRECIATE YOUR TIME AND EXPERTISE TO HELP OUT WITH THIS PROBLEM. BUT MAY NOT BE ABLE TO PERFORM THE TEST YOU HAVE SUGGESTED

updated 3/6/09

sorry for the delay since your last response.I have not been able to obtain a abs scanner tool to buy, rent or, loan. I did perform the panic stop test and found " no" clicking of the abs pump kicking in when panic braking. So i'am not sure if the pump relay is picking or if the pump is bad at this point. Again thank you for your responsiveness, expertise and time helping with this problem

updated 3/14/09
MIKE I FINALLY FOUND A REPAIR SHOP THAT SCANNED THE ABS SYSTEM AND FOUND THE BODY CONTROL MODULE IS BAD, WHICH HAS TO BE HANDLED BY THE BUICK DEALER AS IT HAS TO BE PROGRAMED ONCE THE MODULE IS REPLACED.I HAVE MADE A APPOINTMENT TO HAVE THAT SERVICE PERFORED. THE MODULE IS READILY REPLACED BUT IT HAS TO BE PROGRAMED WHICH TAKES LONGER THAN THE REPLACEMENT. THE PART COST $310.00 WITH THE LABOR THE WHOLE PROCESS TAKES 1 1/2 HRS AND TOTAL COST $455.00.I THOUGHT THE FEEDBACK MIGHT HELP WITH SOME FUTURE INTEREST IN SIMILAR PROBLEMS. THANKS AGAIN FOR YOUR COMPETENT HELP
Avatar
William becker
February 16, 2009.



Inspect fuses and ABS sensors located at each wheel.

Bluelightnin6
Feb 16, 2009.
Test the ABS system on an empty safe road and see if you can feel the " click click click" in the brake pedal. If it is working then the pump is working and it's possible that only one of the wheels is not working properly, which would indicate a faulty sensor.

Bluelightnin6
Feb 17, 2009.
Yes, just as if you were trying to avoid an accident and the ABS kicked in. Just be sure to do it safely and away from public roads. Did you inspect wheel sensor or the ABS sensor?

Bluelightnin6
Feb 18, 2009.
Okay, lets not go buying and replacing parts to see if that fixes though. We want to make sure what you buy is what you need first. I suggest renting or purchasing an ABS capable scanning tool. Performing the following ABS diagnostic tests with a scanner tool will save you a lot of money and headache.


http://www.2carpros.com/forum/automotive_pictures/261618_Noname_258.jpg



http://www.2carpros.com/forum/automotive_pictures/261618_Noname2_79.jpg



Let me know where the tests lead you to and I will help you further with diagnosis.

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Bluelightnin6
Feb 20, 2009.
Okay so now you are going to need to check the relay then to rule that out of the problem To learn how to check a relay follow the link below..

http://www.2carpros.com/how_to/how_do_i_check_a_relay.htm

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