Hello I own f 250 6 liter diesel 2004 Glow plugs seem o.k., but don't know whether relay is gone or glow plug control module. Does anybody know where the relay on firewall is, when it goes usually a loud pop
Hey stinger 438! the 2004 6.0 do not have a glow plug relay on the fire wall. the 6.0 uses just the glow plug modul powered though the engine junction fuse box. Why do you ask? is the truck hard starting in cold?
Thanks for the info.I guess will have to replace module. I have to plug in for hours in the cold for it to start. Wouldn't u know it extended warranty ran out last month. Will have to start doing repairs myself