ABS light stays on

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Dec 8, 2009 | 02:51 PM

riverratba

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Joined: Dec 2006

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From: savannah,tn

ABS light stays on

i just bought a 1999 F350 dually, the ABS lights stays on, is there anything i can check myself to try and find out why the light stays on

Dec 8, 2009 | 09:00 PM

king350

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Joined: May 2009

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From: coastal georgia

had same problem

i have a 2009 f-350 king ranch 4x4 supercrew had the same problem and it was a bad sensor wire on left front hope this helps

Dec 8, 2009 | 09:04 PM

98SurplusExpy

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Joined: Oct 2004

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From: N. Carolina

Best to get the ABS codes read first ... note that a regular scanner WILL NOT read the ABS codes; you'll need to go to a shop with a capable scanner.

I recently had the problem and it was a bad rear differential sensor ... changed it & drove 2 miles ... light went off and hasn't been on since.

Dec 8, 2009 | 10:35 PM

dstig1

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Joined: Aug 2006

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From: W. Wisc

You can try a quick check of the wheel sensors. Assuming you have 4-wheel ABS, then there is a sensor on the rear diff (on top) and one on each front wheel. Unplug them and do a simple resistance check with an ohm meter. If you see zero or open circuit (infintie) then that sensor is bad. Replace it. I believe these sensors show like 5-10 ohms if they are good (there is a little resistance, but not a lot). I know the rear is like that.

But if you can get the codes read for free, then do that first. If it is going to cost you $100 to do it, then do the ohm check first. If they check out OK, then you need to get codes read and probably have more serious work and expense ahead of you.

I suppose there are some other obvious things you could check like if everything is connected, and if the connections look good. That stuff should be obvious for the most part.

-Dave

Dec 9, 2009 | 06:32 AM

riverratba

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From: savannah,tn

thanks for all the suggestions,i will check those sensors and go from there

Dec 9, 2009 | 08:00 AM

senix

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From: Frederick, MD

you might also take the sensor out of the wheel and look at it. I had one one time that was bent. I assume something got in there and it was too far away to read the wheel spin.