Recent Content by Magruder

Thanks for all your help! Ill check the heater itself today with a ohm meter like you suggested. Ill also leave the heater unhooked and hook up the relays to see if I can get them to come on. Last time I checked them I was in my shop so the ambiant air temp was probably warm enough no to switch...

Thanks much for the info! Yes the 40 amp that is blown feeds the fuel heater. Im guessing this is a separate circuit all together? Will any of the 4 18 gauge wires to the relays have 12 volt through them? Did the relays sticking on cause the heater wires to melt? If so looks like ill be...

Ive searched the forum with no luck. I have a 99 3500 cummins that has had a wire melt down at the grid heater. It blew the 40 amp fuse that powers the relay. I unhooked the 2 big melted cables from the grid heater to diagnose the problem but dont have any power down to the 2 relays on the inner...