My passenger front wheel will lock up occasionally when applying the brake. My girlfriend said it did it a few times the other day. I hit the brakes at like 30mph and it locked up and started squealing. I let of the brake and it stopped. Then stopped normal as i continued pulling up to the light.
I have a brake light on. It was low on brake fluid the other day and the parking brake light came on when the pedal got soft. I Put more brake fluid in and haven't lost any break fluid since. Brake light is still on. Its not a ABS light but the parking break light. I tried to clear in with a code reader device. But, was unsuccessful at removing the light. Didn't say there way any codes either.
This started after a trip to the lime rock pit the other day. If it was something to do with the ABS wouldn't the other tire lockup too? Do i even have ABS? I was thinking maybe a bad caliper. Maybe some mud in there or something?

 

Possible that you have a faulty sensor at the master cylinder. check that first. Caliper appears to be hanging up. remove the caliper and used antisieze to lube the slides. As far as abs goes, what year is your jeep?

 

Its a 2000 4.0. I went through a decent amount of mud and rock a few days before having the break lock up deal. There could be some mud or lack of lube in the caliper. So the sensor i need to check is on the master cylinder block? How do i check it?

 

Unplug the sensor and see if the light goes out. if it does its a faulty sensor. if not it's good. Also check the switch at the e-brake handle.

 

Sounds like it may be time for new brakes up front. The low fluid may be from worn pads and maybe even shoes in the rear. Id check them all and make sure to check under re boots on the wheel cylinders for fluid.

 

Brakes pads look good. I've only had to refill the brake fluid once. It was low that one time and hasn't been a issue for months.
Just got done driving it around town on a few errands and i didn't have any lock up of that brake. Im thinking that lube is the issue. I pressure washed the wheels and brakes pretty good after the wheeling adventure. Washed away grease from caliper piston maybe.

 

May have just been some mud between the pads and rotor. I wouldn't worry since its not locking up anymore.

 

just unplugged mine and it went out so now i know what i need to change