ABS issue 2008 ProStar

[Waterloo]

Bill, you got me, but all the problems went away when we swapped it out as did the codes. I believe it has had issues from the day I bought the truck. The ABS trailer light would sometimes come on, then it started as a regular thing, then the tractor ABS started, then we got to the situation I have now. Near as I can figure, this compass module has been dying a slow death. And here is the kicker, it is tied directly in to the datalink that also controls the ABS module. I should have the new module this week, I will know for sure once I install it.

The ABS system checked out fine... The compass module was blowing the codes.

I found this, page 23, cab J1939 compass and ABS effects... The ABS and compass modules are connected according to these schematics.

http://bodybuilder.navistar.com/General/...s08339.pdf