sorry I have to bring an old thread back to life. The glow plug light on dash stopped working, found blown 5 am fuse, replaced, light stays on while fuse is in block glow plugs work normal, modification (harness) has been made, have to pluu fuse to shut off plugs. Question after tracing wires using lame diagram in back of owners manual seems like the glow plug timer and relay are the same unit in front of the radiator, is this correct? Has anyone eliminated the timer relay for a momentary switch like on my skidsteer. thanks glenn, hope its not raining in your neck of the woods on this sunday morning, too many projects too little time!