So you’re saying that you can start your truck and sit in one spot and that light will be out. You can sit and release your brakes and that light stays out until you actually put it in gear and you start moving?
That’s even more odd because all of the warning lights are either hooked up to sensors or switches.
None of that has anything to do with the truck actually moving or going down the road.
Inter axle lock?
ABS/ Wheel sensor?
Door ajar?
Does it light up when the fan clutch comes on?
If it were me and I really couldn’t find any information on it I would first pull that panel off and see if you can follow the wire. It’s possible that might run to one of your switches somewhere.
But if I really had to guess I would think it’s probably the warning light for either oil pressure or water temperature. I would find wherever the senders are and use a long test line to see if those lines are connected on ohms.
Can’t the dealer help you at all? I don’t know anything about Western Star but aren’t they part of freightliner?
Freightliner has dtna connect it will show you everything on your truck but I don’t know whether Western Star has anything like that. But the parts guys for Freightliner have been pretty good if you call the dealer maybe they can help you.
I see there are some Western Star groups on Facebook if you have the capacity to go on there.
