ABS & Parking brake light - Ford Powerstroke Diesel Forum
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Old 06-23-2008, 04:36 PM
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ABS & Parking brake light

they wont got off! occasionally they will turn off then they just turn back on. Anyone got any ideas?
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Old 06-24-2008, 04:53 PM
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Old 06-24-2008, 04:57 PM
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may seem like a dumb question but have you checked the fluid level?
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Old 06-24-2008, 05:22 PM
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yep check the fluid level, if light comes on with fluid full, need to get codes pulled and it will tell you why
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Old 06-24-2008, 05:47 PM
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did you give apull up on the e-brake peddle
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Old 06-25-2008, 04:51 PM
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yep checked the fluid and all is ok. I havent pulled the peddle now. Is there any sensors or anything that could be screwy?
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Old 07-02-2008, 10:08 AM
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cant pull codes because its got a cummins 12 valve motor in it. The motor has been in for several months and it just came on recently. Still got the same problem, anyone got any ideas????
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Old 07-04-2008, 10:56 AM
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Could be two different problems. Brake light could be the switch/wiring under the dash.

The ABS could be a sensor. The sensor in the top of the rear diff. reports the rear wheel speed to the ABS computer. If the ring in the diff. is damaged or the sensor/wires are faulty you can get a light. Also there are sensors for the front wheels as well.

Most ABS lights coming on are due to faulty wheel speed sensors. The sensors are just magnetic detectors that sense the metal teeth on the spining wheel/ring moving across its path.

Hope this will at least point you to some items you can check without pulling the codes. I hate to say it but codes are the most reliable way to isolate and ABS fault.
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Old 07-08-2008, 09:33 AM
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is there a way to tell if the sensors are bad? Should I go to pick and pull and take a few off an old truck and swap them or something?



Quote:
Originally Posted by eagledieselmedic View Post
Could be two different problems. Brake light could be the switch/wiring under the dash.

The ABS could be a sensor. The sensor in the top of the rear diff. reports the rear wheel speed to the ABS computer. If the ring in the diff. is damaged or the sensor/wires are faulty you can get a light. Also there are sensors for the front wheels as well.

Most ABS lights coming on are due to faulty wheel speed sensors. The sensors are just magnetic detectors that sense the metal teeth on the spining wheel/ring moving across its path.

Hope this will at least point you to some items you can check without pulling the codes. I hate to say it but codes are the most reliable way to isolate and ABS fault.
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Old 07-08-2008, 09:34 AM
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one more thing, parking light does not turn off any more and the ABS light turns off sometimes when the truck is not moving, mainly when I first start it. As soon as I start rolling in turns right back on.
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