My 93 F250 light on the dash would not come on when I turned on the key. Would that be a selanoid or glow plug. My coworker said I might have 2 selanoid s. So when I get home I will look at the manual.thanks

 

You have only one GP RELAY. Absence of the light might indicate either a bad relay, a bad controller, or no power to the coil circuit of the relay. By "manual", do you mean the EVTM? If so, that will provide all the clues you need.