It has a different connector. If you look under the passenger side of the dash there is a large connector this is the ste ice diagnostic connector and to the left of that is a 4 pin connector thats the abs diag connector. Did you check both of the fuses?
Will
Hi Will, Thanks for walking me through this.
I did see that 4 pin connector under the passenger side. I think that newer Halden Info center (vs. Info "centre" that I see works on these M939's) has a 2 pin plug (no good for me).
I did check both fuses and they are both good. I replaced them anyway.
What I'm noticing is that my voltage from my alternator is bouncing around. It's going from 26.0v to 28.2v rather regularly (bouncing around).
When I turn on the battery, then put the start switch to "run", I do hear the 2 set of three clicks from the relays or solenoids under the truck (front, then rear, or maybe the other way...hard to tell from the cab). The light is solid and used to go off after about 3 seconds.
I've had it come on after one run (100 miles) before, but it went off before I parked it. This time, it's still on after coming on about 30 miles into a 65 mile trip. I've started and warmed it up several time, but it's still on. Nothing appears loose (connections that I've checked). I had pulled the rear hub about 150 miles ago for an unrelated problem and saw the exciter ring and sensor. They both looked clean on that corner.
I'd like to find one of those info "centre" models to rent or buy to get this light off. Any pointers on the common failure points? If I had another ECU, I'd swap it in to see if that's it, however the sets of clicks are still happening. I'm not sure if that's a positive for the ECU being alive.
Then there's the alternator....perhaps I should sort that out first....could be related...?
