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ALL brakes locked up, or just rear? Rear could mean differential is locked up...Sounds more likely while driving it, as cars now have a front or rear valve so all brakes are not lost at one time..
Anti-Lock Brake systems are all essentially the same they will prevent the driver form applying 100% Brake pressure and locking up the wheels while driving. The ratchet the pressure more slowly to prevent the car from skidding. Our first reaction in an emergency is to slam on the brakes and that is 90% of the time not the right action. So Anti-Lock brakes are designed to prevent this unwanted skid.
THATS NOT THE ANTI LOCK BRAKES ,ANTI LOCK BRAKES PULSE NOT LOCK UP YOU HAVE OTHER PROBLEMS ,CHECK ALL BRAKES FOR HANG UP ,BROKEN PADS ,EVEN REAR WHEELS
Have you checked the emergency brake ? The cable could be locked up. Slowly apply e brake if it feels loose the cable is locked up. You could also have someone watch the cable near the rear wheel to see if it moves .
Eighter you have problem to the to the anti lock brake modelue like a connection .Or there it a stuck valve inside BPMV witch is the molelue likely a dump valve witch is suppose to release the pressure .Unpluging the vacuum hose to the vacuum booster control will just disable the power brakeing mode .Try to figure witch wheel or wheels are not releaseing because the anti lock feature should not come into play unless there are extreame brakeing conduitions .See if its not a problem with a caliper sticking
you have one on the inside of each wheel.
SECTION 206-09A: Anti-Lock Control
2002 Lincoln LS Workshop Manual
REMOVAL AND INSTALLATION
Front Wheel Speed Sensor
Material
Item
Specification
RTV Silicone Sealant FSTZ-19G204-AB (Canada CXC-114A)
NAVSTR Sealer Removal and Installation
Raise and support the vehicle. For additional information, refer to Section 100-02 .
Position the inner splash shield aside.
Remove the pin-type retainers.
Position the inner splash shield aside.
Disconnect the anti-lock brake sensor electrical connector.
Remove the anti-lock brake sensor harness from the brake hose clips.
Remove the anti-lock brake sensor.
Remove the anti-lock brake sensor clip.
Remove the anti-lock brake sensor.
NOTE: Make sure the anti-lock brake sensor is fully seated before installation of the new clip. To install, reverse the removal procedure.
Apply a 2.5 mm (0.1 in) bead of silicone sealant to the outside diameter of the anti-lock brake sensor.
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Rear Wheel Speed Sensor
Removal and Installation
Raise and support the vehicle. For additional information, refer to Section 100-02 .
Disconnect the rear anti-lock brake sensor electrical connector.
Remove the rear anti-lock brake sensor harness from the control arm clips.
NOTE: Clean off dirt and foreign material that may have collected around the rear anti-lock brake sensor before removal. Remove the rear anti-lock brake sensor.
I suspect that you have front disc and rear drum brakes.You did not say which of your brakes are locking up. I suggest that if your front brakes are locking {skid} that means your rear brakes are not engaging. If your rear brakes are locking {skid} then I suggest you have problems with park brake or brake fluid leaking onto the rear shoes.
More info would help me help you. I will check back soon.
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