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Re: ABS Wire Harness for rear wheels
Unfortunately the harness itself can not be repaired it is shielded and signal sensitive, how ever have you tried to purchase it at a Napa or Oreilly's. you might be able to save some money. the dealerships always have more pricey parts......please rate this thanks
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check fuses and relays --their is more than one sensor-also if the hub is bad replacing the sensor will not fix problem --check and clean all the sensors and harness connections sometimes the debris interferes with the sensor
Have the ABS codes checked. Check for power and ground at the wheel sensor harness. Check the ground wire from the ABS module to the body. I always move it from the bracket to the body. Just a note.. You will still have brakes.
I agree that it is more then like the the hub bearing assembly that also houses the speed sensor I would first check that there is no damage to the wiring that goes to the hub bearing that could be easy repaired, or debri that has been caked in between the sensor & the hub, use an air preesure to clean it out. Hub bearings are very expensive, so try this first. Good luck
I had a similare problem. Mechanic found a broken ABS wire connection in the rear left shock area. It did not solve the issue. I pulled out the ABS sensor from the rear diff and found a piece of metal megnetized to it. Removed it and things worked. New mystery about the metal though.....
Eventually I had to redo what the mechanic fixed with the wire connection and I replace the entire harness. Removed it entirely and soldered a cable in between.
There is a good chance that the wheel speed sensor, (ABS sensor) has gone bad or gotten to dirty. It's common for the ABS sensor to get too dirty and can not read the speed ring on the wheel hub since it's magnetic. The common repair is to spray Brake Parts Cleaner on the ABS and speed ring on the hub and inspect for damages to the wire harness. The ABS sensor is on the inside of the wheel hub so it's easy to get to, if you not sure what your looking for. Remove the wheel and along the A-arm, you will find a wire harness which leads to the wheel hub (Bearing). There is where your going to find the sensor, just clean it and inspect for corrosion and gap, you can take paper and fold it 5 times and place it between the sensor and speed ring for the proper gap. Good luck and keep me posted, if there is a Auto Zone around your area, have them scan the car just to make sure it's not your ABS modulator which would cast $$$ to replace.
It sounds like you may have a bad ABS sensor. Best thing to do is check all the wire harness from all the wheels for cracking or breaks. The sensor could also need some adjustment, not sure how it is on the Colorado. There are some ABS sensors that is a part of the wheel hub and just dubble check the wire harness since the hub is going to be replaced = expensive. If it's a ABS sensor that counts the rotation from the wheel hub then it's adjustable.
The sensor may have moved out a way from the ring counter and may just need to be moved closer to the ring which is a part of the wheel hub. Most of the time a good spray of Brake cleaner will fix that. Just follow the the ABS wire leads to the hub and you should see the sensor. Be surprised on how much dirt can collect back there.
Good luck and hope this helps, If you can get to a auto parts store that will scan for free like Auto Zone. The ECM may even have the information to which wheel has the bad sensor reading. At worst, it's your ABS system it self that may be going bad.
You can do it yourself. One bolt. Check the plug and wires before you replace the sensor. A stick or whatever can break a wire and the sensor reads bad, but really it just needs a wire. Worth a quick look before you spend the $ on a new part.