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Brake light and ABS light on...

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Old 04-13-2011, 12:27 AM
Geezir Geezir is offline
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Default Brake light and ABS light on...

So out for a drive tonight and out of the blue the Brake warning light and my ABS warning light come on.

Got home and checked over the system best I could in the dark. Fluid level is up, pedal feels no different than before, brake lights all function.

Ideas?

Where is the ABS sensor located on these trucks?
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Old 04-13-2011, 12:49 AM
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On the half ton its on the rear diff and its easy for the wire to corrode and get nasty. If you have 4 wheel abs then there is on both unit bearings in the front. Also the brake light switch could also cause it.
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Old 04-13-2011, 10:35 AM
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Agreed. The ABS is on the top center on the carrier housing and usually always one on the drivers side wheel hub with an optional one on the pass side wheel hub
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Old 04-13-2011, 01:25 PM
Geezir Geezir is offline
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Thnaks guys.
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Old 04-14-2011, 11:40 AM
Geezir Geezir is offline
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Turned out to be an open circuit reading from the left front sensor. Just so happens that 2 weeks ago I had that wheel bearing replaced.
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Old 04-14-2011, 11:43 AM
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So are yo going to replace it again?
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Old 04-14-2011, 11:57 AM
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My 03 has 4 wheel ABS. Same thing happened with mine, ABS light comes on, the off, intermittantly, then stayed on. Checked all connections, etc during brake job, checked out ok. Turned out my pass side hub assbly/bearing bad.
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Old 04-14-2011, 12:03 PM
gcburkett gcburkett is offline
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I have my truck in the shop today for the ABS light. Seems like the sensor line can rub against the rotor. It may have not been ran correctly when the dealership I bought it from did hub work on it.
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Old 04-14-2011, 12:14 PM
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Sounds like a warranty repair! Yeah, actually replacing mine today, they gotta make sure they place that ABS line in the clamps...pretty long and without it being clamped will flail all over the place.
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Old 04-14-2011, 04:03 PM
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I'm going to have my mechanic look at it next week for me. I'm hoping it's just something as simple as the retainer clip not being properly seated when they put everything together last time.
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Old 04-14-2011, 05:27 PM
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I got a call, the said the front right sensor is bad. They said the connector is rusted and that might give them problems which means they might have to run a wire all the way from the control module to the connector. Why they put these connectors when water will splash up on them is not a good thing. I guess the sensor is also used in the cruise control as well.
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Old 04-14-2011, 05:35 PM
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I don't have cruise control issues with my truck...
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Old 04-14-2011, 08:36 PM
gcburkett gcburkett is offline
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$295 in labor to replace the sensor. There is no way it takes them that much labor to replace a sensor. If I knew which sensor was bad I probably would have tried to tackle the job myself. What kind of scanner are you guys using to pull these type of code. The generic PC base scanner I got did not pull any ABS related codes.
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Old 04-14-2011, 11:15 PM
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A basic OBD scanner wont read the codes...the name of the type of computer that will however has slipped my mind.
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Old 04-14-2011, 11:49 PM
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Probably need a starscan tool. The sensor is real easy. Pull the wheel off and its the only wire on the front axle. One bolt takes it out and follow it and it just unplugs. From what I understand most ABS unit bearings are calibrated so not sure how it works just replacing the sensor.
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Old 04-15-2011, 08:32 AM
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When my ABS came on, all cruise control functions shut down...safety issue programmed into the PCM I suppose. If you just had the other hub replaced, your right side is prolly starting to go. Not sure why they say they have to run it all the way to the PCM. Mine go from the hub to just inside the engine compartment on opposite side of wheel well and plugs in there. Connects to the hub with an allen screw... it's about a 3' long wire assembly.

Not sure if you can just buy that separate though without the hub assembly....as that1guy said.

Good luck, let us know what transpires.
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Old 10-21-2011, 01:02 PM
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I am having the same problem with my 2005 4.7L 1500. brake light and ABS lights come on and my speedo quits working. Took it to the dealer yesterday and was informed that there is a short in my ABS control module. They want $750 to replace. I can find the part for under $200 but I can't find any help on how to do the work.
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Old 03-16-2015, 09:19 AM
RobertTyrrell RobertTyrrell is offline
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Default ABS and brake light on left/right turn

Before you tear into your ABS sensors Here's a simple fix; Check your brake fluid levels. if it approaches the "Min" fill line this will effect your ABS brakes fluid level sensor as well.
Making a right or left turn, braking, or moving forward will tip fluid level enough to trip the sensor.
Not checked your fluid level in a while? Recently replaced a brake component? You may have small leak? or brakes are wearing?
Not the problem? Now check your ABS sensors and contact points in you live in salt belt.
Hope this helps someone before spending time or wasting $.
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Old 03-16-2015, 09:19 AM
 
 
 
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