ABS light

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Mar 22, 2008 | 12:35 PM

93F250

Thread Starter

Laughing Gas

Joined: Feb 2004

Posts: 1,139

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From: Maine

ABS light

My ABS light is on and failed state inspection because of it. It's been on for quite some time and the brakes work just fine. The light is not blinking. Any ideas where to search for a problem would be appreciated. Thanks!

Mar 22, 2008 | 12:39 PM

elmo8641

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Joined: Jan 2007

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you need to get a scanner that can pull abs codes. get the code then you will know where to start. prob going to be a bad speed sensor but you have to have the code

Mar 22, 2008 | 12:44 PM

elmo8641

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does your speedometer work? if it does i would check the front sensors for resistance. there should be less than 500 ohms for the front sensors, 2500 for the rear. when you turn the key does the light come on and stay on or does it come on, shut off, then come back on when you start moving?

Mar 22, 2008 | 12:47 PM

93F250

Thread Starter

Laughing Gas

Joined: Feb 2004

Posts: 1,139

Likes: 4

From: Maine

Speedo works fine. ABS light does not come until I get up to about 5 mph. Then it stays on until I shut the truck off.

Mar 22, 2008 | 01:46 PM

Leimir

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Joined: Mar 2008

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Had the same problem, would come on at about 5mph, but at first it was occasionally after you turn the truck off the light would reset. But then it stayed.......was the right front wheel speed sensor bad.

Mar 22, 2008 | 01:46 PM

dew the thunder

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Joined: Feb 2007

Posts: 805

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From: South Bend, IN

My 99 was doing this for awhile. Then one day the speedo wouldnt register until after 15 mph. Then it got scary. The trans would literally slam itself into second gear. Ended up bein the rear speed sensor.

Mar 22, 2008 | 02:06 PM

elmo8641

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Joined: Jan 2007

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it sounds like a front sensor, but since it does not come on till you are moving then the resistance may not tell you anything. i would check the ohms for both front sensor and if one is alot higher than the other i would try to replace it. or if you get a code i can get you the flow chart for the code