ABS issue

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Oct 25, 2010 | 05:12 PM

doubleford

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ABS issue

Gentlemen,
I have an issue with the ABS unit in my 2002 AWD expedition. The ABS light came on so I had it diagnosed to a front right sensor. I replaced it and the yellow light in the dash went out. Now it feels like the ABS activates every time I stop, hard, soft dry roads, doesnt matter. I have only driven it about 3 miles since I replaced the sensor and I unhooked the battery for ten minutes but it still seems as though the ABS unit is activating all of the time. Any thoughts?

Oct 25, 2010 | 06:34 PM

alloro

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Are you sure you installed the sensor properly and that it's fully seated?

Oct 25, 2010 | 08:06 PM

doubleford

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I am sure that it is installed correctly and reasonably sure that it is seated properly. If it werent wouldent the ABS light come on?

Oct 25, 2010 | 09:49 PM

alloro

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Quote:

Originally Posted by doubleford

If it weren't wouldn't the ABS light come on?

No it would not. The ABS light would come on if there was a break or short in the circuit, like when the last sensor was no good. If the new sensor isn't seated fully, as in some dirt or crud is in the way, then the circuit is still complete which leaves the ABS light off.

However, since the sensor is too far away from the exciter ring, it will not register any pulses as the wheel turns so the ABS modules thinks the wheel is locked up and you get the ABS pump kicking in. This sounds like what's happening with you, so I thought I'd ask how sure you are about the sensor's positioning.

Oct 26, 2010 | 03:28 PM

doubleford

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Thanks Alloro, I am going to check it now. I will let you know how I make out.

Oct 26, 2010 | 04:23 PM

doubleford

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I took it all apart again and found some famous ford rust holding the sensor up a bit. Cleaned everything carefully put it back together and took it for a test drive. Problem solved. Thanks for your help.