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abs systems do not lock on the brakes
they release the brakes when the wheels stop spinning and when the wheels start turning again apply the same brake pressure as before the wheels stopped spinning
check the proportioning valve to the rear brakes to ensure that it is not acting as a one way valve and that is causing the problems
if the compensating port in the master cylinder for the rear wheels is blocked that also will lock the rear brakes
replaced front and back brakes already ??? This has nothing to do with the ABS ,traction control is part of the anti-lock brake system . Light's on DTC'S - diagnostic trouble codes stored in the ABS control module . Sorry but , your best bet ,take your vehicle to a qualified repair shop , before you hurt yourself. Take's year's to learn how to diagnose these electronic control systems
the abs light on the dash should come on when the abs is working (emergency braking)if it comes on when braking normally(gently)chances are a sensor is gone(replace in pairs,fronts & rears)
abs stops the wheels from locking up in an emergency brake situation,you will feel the grab-release,grab-release on the brake pedal......
Turn your key on and look for an A.B.S light or look under your truck for a wire harness going to the center of the back of both front brake rotor's, also check the rear end for a sensor above the rear end cover on the rear end housing.
The ABS is only a sensor and won't effect the brakeing even if the light is on. the only thing I can think to check is the steel brake line that connects to the rubber line. May be it's pinched and isn't letting the pressure off when you let off the brakes.
John, My 99 F150 had an abs light on and I found the right side front wheel sensor wire had fallen off of the inner fender mount and burned the insulation and grounded the wires together, I taped up the wires and tied it up and the light went out. Your ABS module is located directly beneath your air cleaner next to and just above the steering gear box. It is black plastic and silver alumnium. Says Kelsey-Hayes right on and has six brake lines attached to it. As for the rear brake take that drum off again and have someone help by pushing the brake pedal down while the drum is off press lightly and very slowly, verify that the brake cylinder is moving, do not push hard and fast as it will probably blow the pistons out of the cylinder! If is is frozen replace it and bleed and it should be fine. The brake light is probably on for low fluid. Let me know how it goes.
1999 Ford F Series Stereo Wiring
Constant 12V+
Light Green/Pink
Switched 12V+
Black/Purple
Ground
Black/Green
Illumination
Light Blue/Red
Dimmer
n/a
Amplifier Remote
Blue
Antenna
Right Front
Front Speakers
6" x 8" Doors
Left Front (+)
Gray/Light Blue
Left Front (-)
Tan/Yellow
Right Front (+)
White/Light Green
Right Front (-)
Dark Green/Orange
Rear Speakers
6" x 8" Rear Corners
Left Rear (+)
Orange/Light Green
Left Rear (-)
Light Blue/White
Right Rear (+)
Orange/Red
Right Rear (-)
Brown/Pink
replace the left front wheel hub assy. with 4 wheel abs. The spedometer works off of the left front wheel sensor. It will fix the abs/brake light and the spedometer will start working
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