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My ABS and brake lights come on at low speeds; 1993 Ford F250

The ABS system locks up as I drive and will not release. To disengage, I have to disconnect the battery and take out fuses. Please help.

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You probably have to replace the controller (abs switch under car) which on my van (2001 windstar) was about $800.00 bucks....mine was under warrenty but not any more...when you take off the battery cable this dis-engages the power to the contoller. i could be 100% wrong...take it to your mechanic...its obviously not safe like that....

Posted on Jun 24, 2009

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ABS CHECK LIGHT DOESNT COME ON WHEN YOU TURN KEY ON


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2. You can test if the ABS is operational. On a very quiet damp surface, straight, wide road( with NO other cars around), apply your brakes hard from a very low speed - up to 20 mph ONLY driving in a straight line - until the car stops. The front brakes should attempt to lock up under hard braking and if the ABS is operational you will feel it kick in and the brake pedal will pulsate as the ABS constantly allows brake pressure and then releases it to prevent the wheels from locking up on the damp road. If the ABS does not kick in be ready to release the brake pedal quickly to allow the wheels to rotate so you can steer the car safely. Without the ABS the front wheels should begin to lock up on the damp road surface due to the low level of tire grip. ONLY test this at very low speed and ONLY when driving in a straight line on a straight section of wide road with no other vehicles around.

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