Why does my anti-lock brake system engage for seemingly no reason?

I have a 1997 Mercury Mountaineer with all-wheel-drive. The brakes are almost completely brand new (just replaced a few months ago) and the conditions will be pretty much perfect (no rain/snow/ice) and I'll brake slowly and be pretty much almost completely stopped and the ABS engages (brake pedal just freaks out). my mechanic said it could be a million different things and probably isn't a problem but I'm just curious as to what the deal is|||There is a good chance that one of the wheel speed sensors is going bad, particularly at low speeds. The ABS module just reads it as a one wheel spinning faster and thus pumps the brakes at that wheel. You will need to find a shop that can read the sensors to fix the bad one, or take it to a dealer. Good luck.|||On some models of the Explorer and Mountaineers,there was a problem on the ABS system.Look undernearth the vehicle,at the drivers side front wheel.You may have an ABS sensor wire,that is longer than it should be.What often happened on thses models,was the lead would end up,leaning against the axle.The touching of the two,often fooled the sensor,through contact and vibration,that conditions required the ABS system to engage.Use a cable tie,and tie the lead up,away from the axle,if you have this problem.Do not tie it too tight,since it needs to be able to move somewhat.Your ABS light should go off and your system be fine.|||check all your tires are the same size if the brake sensors measure a difference in rotation speed they will switch the ABS on, also check the pad clearances, common sense says no trouble before the brake job - trouble after the brake job cause = brake job|||Your mechanic is 100% wrong and go to another mechanic for a second opinion at once. Faulty brakes can kill you and anyone in your car.





I am rebuilding my 71 Plymouth Satellite and out of the 10K I have put into it so far $1200 of it has been just in replacing the entire brake system.





Go to Midus, Jiffy lube or even Amco transmissions and tell them about your problem and they should be able to at least point you in the right direction to someone who can fix your brakes properly.