Lately my Tractor ABS light come on and stay on and then next time I get in the truck it is off,does it suppose to be on or off and this while I am pulling a trl. Also notice that when I apply my brakes especially with a heavy ld my truck seem to pull to the right,any suggestions. Thanks

 

the light should be off. it should only come on momentarily when the key is first turned on


check brake adjustment & wheel seal leaks

 

Usually an ABS light has nothing to do with actual brake performance under normal conditions though. The ABS light mostly covers things that would only affect you if the ABS was needed. It is very common to see them on for weeks and months and nobody really gives a darn, or covers them with black tape. Usually pretty easy to fix what is wrong too.

Birken

 

furthermore, when the light is on, the abs system is usually disabled, and does not function at all

abs is mandatory and causes a failed inspection, that reduces some of the black tape issues ;0)

 

I seem to recall there being a regulation that requires the remaining parts of the ABS system to still be operational, for instance if a front modulator valve is out there is no reason the rear ABS could still not be functional but I am not certain about that, it's been a long time since I took the class.

Birken

 

you'll notice i wrote "usually disabled" as i am aware that certain exceptions do exist. i'm not sure of where the line is drawn...

 

If the light usually only comes on at startup and and up to 4-5 MPH. If it comes on, the ABS can partially become disabled or totally. If it is partially, then the ABS will not work as a set, either front or back axles or diagonally. I would asume that it is totally disabled. Check your Wheel speed sensors first. Most likely problem. Have you had your brakes done lately? I commen mistake is the tech hitting the WSS back when working on the brakes. If you know when the ECU is, alot of times there are lights on the outside to tell you where the problem is. There are other ways also like the the ABS light on the dash will blink codes. Sorry for all the mumbling but yes, get it checked out before you forget.

 

Thanks for the reply,don't know if this is important point that I pull container,think that has anything to do with it.

 

Look to the front brakes for any pulling issues. Check adjustment first, followed by checking for grease contamination or other problems next. Probably does not have anything to do with the ABS light. The ABS light should be out normally and comes on when you have a problem. I can help work you through troubleshooting the ABS if you want, it is not too hard usually.

Birken

 

not unless the wind always blows out of the north east... and the direction of pull changes on the trip home ;0)