ABS Brake Motor Running Constantly

[Zibi]

Hey all,

 

Last night the pathy developed a new problem. After the truck had sat for a couple of hours, I turned it on and the ABS light came on, and the ABS motor began to run constantly whether the truck is on or off. The only way to stop the ABS motor from running was to disconnect the battery. Today I pulled the fuse for the ABS motor in order to stop it from running.

 

I have two questions:

 

1) I understand the ABS system won't work with the fuse pulled, but the brakes should otherwise work correct? Everything is shut down for a few days and I won't be able to get it fixed until next week but I need my truck.

 

2) What could be causing this? I talked to my brother who was a service advisor for a couple years and he had never heard of the problem before.

 

 

Note: My brake fluid level is 2/3 of the way between the Minimum and Maximum levels, so it's not because I'm short on brake fluid. I have no leaks in the brake fluid system as far as I know as the level has not changed in several years except due to brake wear and then my subsequent replacing them.

 

Thanks everyone! I need my truck to get around but want to make sure I won't kill myself or anyone else in the mean time.

 

Cheers,

Allyn

Edited December 31, 2010 by Zibi

[Zibi]

anyone??

[adamzan]

You can still drive it without abs. If the brakes still feel good with the fuse pulled I wouldn't worry about it until you have the time to deal with it.

[Zibi]

Awesome, thanks I was fairly sure of that (I've been driving it anyway...) but it's still nice to hear someone confirm it

Edited January 2, 2011 by Zibi

[nunya]

ABS is supplemental, all pulling the fuse did was disable it making your braking system a "normal" braking system. Drive it as such (you won't have the computer controlled "brake pump" when in a skid or panic stop).

 

As for why the pump is constantly running... You say you have a light which I would think equals a code. Dnot personally know if there's a way to self pull it or not though, sorry. But that's where I'd try to start once you can.

[sewebster]

Umm, what is the ABS brake motor anyway? Where is this?

[Zibi]

ABS brake motor is in the back passenger side of the engine compartment, bolted to the firewall. To be honest, I don't know specifically what it does, I speculate it would power the solenoids, but I'm not really sure.

[Channel595]

sounds like the relay is stuck or the accumulator developed a leak and will not hold a 'charge' of pressure

[fleurys]

There is a complete ABS diagnostic procedure in the fsm... Did you do it ?

[Zibi]

No not yet. In the FSM it says to ground the DLC using a wiring harness, which I don't have. I talked to a local guy who sent me some screenshots of the shopkey procedure that shows how to ground it just using a piece of wire, but I've been too lazy. I'll post up here when I run the diagnostic, but I'm thinking I won't get it fixed for some time as I'm a poor student right now