i have a 84 ford 250 with a 6.9 diesel in it im new to the hole thing i think my relay is gone bad but i dont know how to test it with a manual gp botton inside the cab?? any help full hints or experieces???? HELP HELP. thank for looking or responding to this. pete

 

This is a duplicate thread so it has been closed to keep the proper information posted in one thread.