ABS Light on, drivers side rear wheel locked, all others moving

[xchecko]

the abs light is on & the drivers side rear wheel is locked & i cant move my explorer. my brakes were bad so im thinking it might have to do with the abs rear wheel speed sensor from what ive been reading but im not sure where that is or how to clean it from debris that has built up over the almost 9 years ive had my explorer

 

[matt0248]

the rear wheel is locked than either the caliper is seized and locking up the rotor, the parking brake is stuck on, the wheel bearing is locked or the differential is messed up and locking that axle and allowing the other to spin. Start by taking the caliper and rotor off to see if it moves, if not than it's either the wheel bearing or differential.

 

[05exploder]

I had this problem just my right rear was locking up. Had it scanned and it said front left sensor was bad. That makes me think your right front might be messing up.