ABS light and brake lights - Diesel Bombers



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Old 05-30-2010, 08:44 AM
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Default ABS light and brake lights

howdy guys i have a 02 24 valve in a 3500 the abs light is always on and the brake light is always on question is would the emergency brake shoes being worn down cause the brake light to stay on i have new pads/disk in the front and plenty of meat on the rear (almost like new) not too sure where start with the ABS light problem . any suggestions ? thanks in advance
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Old 05-30-2010, 04:50 PM
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I had the same problem with my Dodge 3/4 ton. Dealer wanted $375 to trouble shoot. I asked around and was told to replace the rear wheel speed sensor ($32). This sensor sits on top of the differential behind a small rock deflector. When I changed it out, the two lights remained on....I thought I'd messed it up. Then I realized that it is a motion sensor and needed to be in motion to work. Once I began to drive the truck, the lights went out. $32 is a far cry from $375 just to trouble shoot. I hope this helps.
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Old 05-30-2010, 06:30 PM
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Should look into the ABS sensors on the front one on each wheel and make sure there is a good connection on both,check for the wire being burned to by the dust shield and the rotor if it touches it it will burn throught.
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Old 05-30-2010, 10:59 PM
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thanks guys will check both in the mornin
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Old 05-31-2010, 07:40 AM
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I would start with the rear sensor first. Reason: As per the owner's manual, there is an electronic variable brake proportioning (EVBP) system that regulates rear ABS braking pressure depending on road and speed conditions. When this rear sensor malfunctions, it will prevent the EVBP system from working and will illuminate the BRAKE light continuously. When the EVBP stops working, it will trigger the ABS light. If you only have a front wheel sensor problem, I'd expect that you would only have the ABS light illuminated, and no BRAKE light. This does not mean that you don't have two failures (front and rear sensor failure), but I'd still start at the rear sensor. The rear sensor is also suseptible to rocks kicked up by the front tires. There is a small rock deflector in front of it, but it is fairly thin material....mine failed while driving on a loose gravel road. I hope this helps.
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Old 05-31-2010, 09:24 AM
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yep the rear sensor is the culprit most of the time
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Old 05-31-2010, 10:13 AM
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When both wires are welded in a sense to the dust shield it will lite both Brake and ABS lights.I would start with the rear too.
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Old 06-06-2010, 04:50 PM
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Ok thnks guys the problem was the rear sensor changed it out all lights went out all is good
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Old 06-06-2010, 04:51 PM
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Excellent to hear!
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Old 06-06-2010, 06:32 PM
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