Diesel JD
Full Access Member
Mainiac, what probably happened is that latching relay stuck open and burned that glow plug...I'm a little surprised all the other ones tested good(or did they?) Mel has a way to make that system a bit more reliable, while retaining the stock functionality if I recall, maybe you can refresh our memory. Anyway, I'd either do that or go to a straight toggle switch. I don't trust that latching relay for a minute. Its crap. Great when it works, but not failsafe.