Maybe it would pay to go to school just to work on semis???? If I go south west, I could have better weather than Ohio and a pretty good income???? Sam's Semi Repair.....has a nice ring to it???!!! ....
Tell ya what Kat, you do the tractor repairs and I'll handle the trailer....
There's more than likely a problem, or they messed something up. The light is on for a reason. Without actually being able to "get into" the system, it's hard to make a good choice. The system could very well be fully functional, it probably went into "fail-safe".
WABCO is Westinghouse Air Brake Company. Code 41 is related to the engine (tractor) Code 44 is related to the ride heigth system on the trailer.
I'd say they either messed-up the wiring to the bags, or crossed something. I'm e-mailing you a PDF file--acrobat reader. check out pages 16 and 17 for trouble-shooting the light. Let me know if you need more......
Idle-up or sticky idle, are two different things. Sticky idle, I'd check the throttle cable and linkeage to the pump. Idle-up could be the TPS, but unlikely I'd look at the other sensors.
It threw a code about a week ago for the TPS .... so I changed it .... worked OK for a couple of days ... code went to inactive ... but the problem has come back ... could be in the harness ... I think ... maybe .... had a loose wire a couple of years ago ,,, had no throttle at all ... so maybe ..
I'm going to make a trip to Freight liner when I empty out and see what they say now that I know the ABS might be in the traitor .... fix the idle might be half the ABS '.......
It threw a code about a week ago for the TPS .... so I changed it .... worked OK for a couple of days ... code went to inactive ... but the problem has come back ... could be in the harness ... I think ... maybe .... had a loose wire a couple of years ago ,,, had no throttle at all ... so maybe ..
I'm going to make a trip to Freight liner when I empty out and see what they say now that I know the ABS might be in the traitor .... fix the idle might be half the ABS '.......
I can see a loose wire, especially a circuit ground causing these problems. Be sure you tell them as much about the past problems you remember. It helps alot on diagnosis.