rear anti lock brake light on
 

hey guys, my rear anti lock light keeps flashing on and off and as of just recently it just stays on the whole time. but the truck still seems to brake just fine. could the problem be from a bad sensor? and if so, where is the sensor located at? oh and the truck is a 5.0 AOD trans. 2 wheel drive
thanks

Assuming you have a 92-96, I just learned this week that the Hydraulic rabs valve is on the left frame rail just downstream of the master cylinder. Has a 8" long wire pigtail coming out of it. The electronic module is behind the glove box. Approx 4"x6" block box. The sensor is mounted on top of rear diff and it is the vehicle speed sensor, so if speedo works good, probably not the culprit. These are the locations of the parts on my 96 F250.

yea i dont know if that would be the same as what i have. sorry i forgot to mention its a 89'. but it wouldnt hurt to go look to see if the setups are the same