Hi! I have a 1983 GMC High Sierra w/6.2L. Ploblem is my glow plug light will not turn on and the truck will not start. I replaced the relay and the 2 wires coming out but no current on the other side of the relay where it goes to my glow plugs. Is there any one who can HELP me or even tell me how to by-pass the system to work manually. Sure would appreciate!!
Cris