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2004 Buick LeSabre abs light on #4758008
05/15/18 03:24 PM
05/15/18 03:24 PM
Joined: Aug 2014
Posts: 68
usa
GerGa Offline OP
GerGa  Offline OP
Joined: Aug 2014
Posts: 68
usa
Ok I have a 2004 Buick LeSabre 100k miles. The abs light came on today so I scanned it when I got home and despite that the light is on, it showed no current codes. It is a GM tech ii scanner which can give past stored codes as well and showed two codes for the right front wheel speed sensor. The right front wheel bearing was replaced in error due to my bad diagnosis(oops, "grinding" sounds was actually low fluid) 10k miles ago. My front brakes are warn to the squeakers but I don't think that has to do with it. My brake fluid is not low.
Any ideas?
Thanks

Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4758013
05/15/18 03:31 PM
05/15/18 03:31 PM
Joined: Jun 2017
Posts: 553
DFW
JustN89 Offline
JustN89  Offline
Joined: Jun 2017
Posts: 553
DFW
Just a guess, but that sounds like a faulty speed sensor to me.

Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4758075
05/15/18 05:19 PM
05/15/18 05:19 PM
Joined: May 2005
Posts: 567
Arizona
JGmazda Offline
JGmazda  Offline
Joined: May 2005
Posts: 567
Arizona
I have a 2001 with ALL THREE of these on - Traction, Brake, ABS. It sometimes goes away but it's aggravating.

I am assuming ABS sensor. I hear it's not uncommon. Wish I knew the answer to both our questions.

Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4758168
05/15/18 07:08 PM
05/15/18 07:08 PM
Joined: Sep 2015
Posts: 3,869
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,869
Connecticut
A crack in the tone ring can give the warning light. But usually that is also accompanied by actual ABS activation when you're slowing to a stop. Maybe that activation is dependent on the size of the crack. My front left tone cracked to give a 1/8" or bigger gap. My ABS kicked in every time I was slowing down under 12-15 mph.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4758184
05/15/18 07:31 PM
05/15/18 07:31 PM
Joined: Dec 2017
Posts: 400
Massachusetts
VeryNoisyPoet Offline
VeryNoisyPoet  Offline
Joined: Dec 2017
Posts: 400
Massachusetts
With a car at that age, check the wiring and the sensor connectors - especially since you had recent work done there. Working in that area can easily dislodge or damage the wiring and return a fault code. Tone rings and sensors are pretty robust themselves, but the support components often fail because of all the vibration, water, and heat they encounter.

If you have a digital multimeter, you can unplug the sensor and check if you get a resistance reading. All vehicles will be different but as a rough guess I'd expect to see something between 800 and 2000 ohms.
Compare the suspect sensor to the others on the car to get a baseline. They should not vary from each other by more than a couple hundred ohms.

Much less (or zero!) resistance means the sensor has an internal short circuit and must be replaced. Infinite resistance (OL) means there is a break in the sensor and it also needs to be replaced.

If there is no connector at the sensor itself by the hub, but instead a wire, you may need to follow it up into the engine compartment to where there will be a connector.


1998 V70 GLT / 192k miles [10w-30 Valvoline Syn w/ Maxlife Tech + Mann W917 filter]

"Use yah blinkah!"

"Be nice. The alternative involves an air horn and 7000 lumens of high beam."
Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4758225
05/15/18 08:32 PM
05/15/18 08:32 PM
Joined: Jun 2003
Posts: 33,109
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,109
ME
The wiring goes bad, right at the connector. You can buy a new connector with six inches of wire pigtail; splice that in and you're good to go.

Wires break inside the insulation right at the sharp corner. You're getting an intermittent connection-- this will quickly fail completely.

Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4758424
05/16/18 06:08 AM
05/16/18 06:08 AM
Joined: Jan 2017
Posts: 632
Melbourne, Florida
RichardS Offline
RichardS  Offline
Joined: Jan 2017
Posts: 632
Melbourne, Florida
I 3rd the broken wire.

Mine century did the whole “ABS/Tracoff/service vehicle” dance for awhile, to the point it only worked *in* the rain after I’d splashed enough water into the harness to complete the connection.

Happy hunting!


2008 Dodge Caliber SE 2.0 117k
4qt Imeditsu 0w-20, 1/2qt Mobil SS 5w-20 Fram HM

2003 Buick Century 107k
4.5q Havoline 5w-30 HM Fram XG
Re: 2004 Buick LeSabre abs light on [Re: eljefino] #4780324
06/07/18 04:38 PM
06/07/18 04:38 PM
Joined: Aug 2014
Posts: 68
usa
GerGa Offline OP
GerGa  Offline OP
Joined: Aug 2014
Posts: 68
usa
Originally Posted By: eljefino
The wiring goes bad, right at the connector. You can buy a new connector with six inches of wire pigtail; splice that in and you're good to go.

Wires break inside the insulation right at the sharp corner. You're getting an intermittent connection-- this will quickly fail completely.

It is an intermittent connection as the light turns on at random times like right away or after 15 miles.
I'd do this but not sure where to get a pigtail. Rockauto has the entire cable for $50. That's a lot of money to throw at the car unless I find a pigtail for cheap. Not sure what the mechanic would do different.

Re: 2004 Buick LeSabre abs light on [Re: GerGa] #4780592
06/07/18 08:31 PM
06/07/18 08:31 PM
Joined: Jun 2003
Posts: 33,109
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,109
ME
It might look like this. If so, GMs use these connectors all over the place and you could find some in a junkyard where they pulled an engine or god knows where. They also used them on ABS systems but these see more weather and flexing.


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