Hi Gary it could be one of two fuses. On the fuse panel under the dash fuse number 17 a 10 amp fuse. Or in the power distribution box item number 17 a 50 amp maxi fuse. Hope this helps
OldBull8 what book is that out of? good information!
I tagged trackspeeder and F250, maybe they will be along and can help. I've seen them give a lot E4DOA advice.
Thank, I will check this today. I do not have a power distribution box under the hood. My truck is an 89. Best I know is all I have is an under dash fuse panel and that has been broken loose so many times its now hell installing any fuse. Nearly impossible to hold the panel while you push in a fuse.