I was wondering if anyone has a clue as to why my ABS/E-Brake light is on, and what I may be able to do about it?

Bow

 

The Haynes manual says:

If the ABS light comes on and stays on make sure the parking brake is off and,
1)Make sure brakes, calipers, and cylinders are in good condition
2)Check connections at control unit
3)Check fuses
4)Check BOO Switch (Brake On/Off).

The BOO switch is located at the top of the pedal, and should have voltage when checked with a 12V tester.

 

As flafonman said, Check the brake pedal switch. While the pedal is released you should have voltage on only one side. If you have voltage on both sides and the pedal isn't depressed, then you got a bad switch.

Do the brake lights (back of truck) stay on continuously?

If so, then I would definately suspect the BOO switch.

Good Luck!!



FordMasterTech

 

Thanks for the quick reply guys,

No, my brake lights arent on, but I will check the BOO switch as you suggested. I have depressed and released the parking brake many times, to be sure its been released. My brakes are working fine. The parking brake holds, and the brakes are working fine. I've been driving around with the lights on(Dash Lights) for several days now.

Any Ideas?

Bow

 

Will the ABS flashout a code like 3 flashes, a pause, and then 2 flashes, pause, and repeat? Like for a code 32..
That may help pinpoint a starting point. for the ABS light.
Sorry, but I guess I missed seeing that in your post originally.

FordMasterTech

 

No, It doesnt flash...but a funny thing. When its raining the lights will go off for a short time. I'm scratching my head.

Thank for the help
Bow

 

Try this. While pulling on the Parking brake release pull up on the parking brake pedal. If this happens to turn out the light your parking brakes meed to be looked at. The lever is most likely seized.

Regards

Jean Marc Chartier

 

Thanks JMC,

I was begining to think everyone had given up on me! I will try that as soon as I can.

Thanks
Bow

 

Hi,
I was wondering if you ever solved your problem and if so what you did? I am having the same problem in my truck. Thanks for your time.

 

My van did the same thing two different times, the light went out when it rained the first time. The next time I had problem it would "go away" when cold or rainy. I cleaned the speed sensor connection at the rear differential. There are two clips that hold the harness to the speed sensor,one you can see and one on top. They are fragile!! The easiest way to disengage both of them is to use two tooth-picks to hold each one open. Pull the wire harness away from the speed sensor and clean with alcohol or TV tuner cleaner. Use dieelectric grease on the fitting before reinstalling. If you still have problems and it goes away when it rains or is cold the speed sensor is probably going bad.

 

Thanks alot I really appreciate that. I will try it this weekend.