ABS light, sometimes... - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-12-2008, 08:54 PM   #1
Darrel
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Default ABS light, sometimes...

Just the other day i had some weird brake things going on...

I went to stop at a light and when i applied the breaks it did the anti lock pulse thing (I was no where near locking up the tires...) and then went to breaking normal. about 5 seconds after that the ABS light came on. i got to where i was going and when i left again later that night the light is back off... i drove up to see Sara last night and about half way here the light came on again (but no pulse thing). this morning the light is still off...

SOOO... what the HECK could this be? wheel speed sensors going bad but not gone?
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Old 01-12-2008, 09:45 PM   #2
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Sounds like a bad wheel speed sensor. Could possibly be the wiring too. But, most of the time its the sensor. That is built into the wheel bearing which is what you would need to replace.
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Old 01-12-2008, 10:03 PM   #3
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its part of the bearing? bummer... i guess i could replace them but that sounds a little expensive... is there a good way to test them so i know for sure thats it before i start throwing money at it?
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Old 01-12-2008, 10:15 PM   #4
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First scan it to find out what code was set and which side. Then use an ohm meter on the pigtail of the harness and twist the wire around and see if you get sparattic readings.
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Old 01-12-2008, 10:21 PM   #5
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I stopped in at Auto Zone and asked if they would scan it for me and they said they can't detect anything break related... Hmm, time to put in a call to my manager friend and get the real story. i kind of think the guy i asked wasn't sure what was going on. if not, i hear you have a nice snap-on scanner... we may have to meet up sometime
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Old 01-12-2008, 10:26 PM   #6
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My Snap-on will scan into ABS codes, as long as they are in the memory
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Old 01-12-2008, 10:31 PM   #7
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yeah, i just called my manager friend and auto zone can only scan check engine codes. they didn't invest in the good scanners.
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Old 01-13-2008, 09:21 AM   #8
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hmmm, we really do need to have a meet soon guys....

AND, my birthday is on the 16th
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Old 01-13-2008, 12:27 PM   #9
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An intermittent ABS issue is going to most likely be due to a flaky WSS (hub assembly). The trick is figuring out which one without a scan.

I suggest disconnecting and cleaning all 4 WSS connectors for starters.
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