ABS light ON???

skutr did pass the time by typing:

Odds are the ABS computer connector is full of junk and needs a good cleaning.

Watch the contact cleaner as it will eat paint. I find it easier to work over the air filter box and use a plastic bag and paper towel to collect debris.

Problem with the ABS system, if the ABS light stays on then the ABS function is disbled but the brakes will still work normally. Could be a wheel sensor (cheap) or the ABS control unit (not cheap). If you've had all that rain I'd suspect a wheel sensor plug got some water in it.

It can be one of two things, and is probably one or more speed sensor on the wheels, but could be the valve body that routes the brake fluid to the wheels.

It depends on when the ABS light comes on. If you start the car and the light comes on with the key, but goes out after a few seconds, then comes again BEFORE you start moving, this normally means one of the selonoids in the valve body is toast. On my BMW, the valve body is about $1000. If the light comes on with the key then goes out, then comes on again AFTER you are moving, then you have lost a speed sensor in one of the wheels.

Be wary of the speed sensors because they are susceptible to poor electrical connection, but are often replaced at a cost of about $100 each - again, pricing from my BMW - when they often will work again if they are just unplugged and plugged back in. Perhaps a shot of contact cleaner while they are unplugged ...

When I still had ABS, my ABS check light illuminated due to road grime/tar that had collected on the ABS sensor on the front driver's side brake assembly. Cleaning it off with a rag and WD-40 cured it.

Jerry

Did you unplug the sensor(s) and take it to the bench to work on it?

If so, I suspect the particles that collected on it were not the problem.

My BMW had those particles too, and I cleaned them in place and the problem remains. That is, the lead was long enough that I brought the WD40 over to the car in my attempt to clean the sensors, and could accomplish the task without disconnecting the sensors. I need to repeat the job, but this time I need to actually unplug the sensors at the connectors.

My ABS light will go for days without coming on, other times it will come on within 20 of begining to roll. I once noticed the ABS light came on in Reverse ...

I have had the light go on in my other cars (non Jeep) and each time it was a little plug that plugs into the brake pedal. It just shakes loose and doesn't make contact anymore.