DennisFolsom
Gold Member
Yes, I noticed that there is no glow plug light in the dash display. I sell medium duty trucks and we always have a coil light that lights on the dash so I thought it was strange not to find one. The good news is I am aware of it now.
I don't know about this detail on the 4100.. However, my 4600 does have a light on the dash for the preheat. Also, on the 4600, you push in on the ignition key, while in the "On" (not Start) position for however many seconds you want to preheat. My manual covers that. Again, your 4100 may have a different system than my 4600.