I recently picked up a 1997 f250 7.3. When I picked it up, the previous owner said it needed new glow plugs cause it didnt want to start when it was cold. I thought to myself thats an easy enough fix. I got it home, the next day I cleaned and tightened the battery cables and that solved the slow crank. As for the glow plugs... the wire that goes from the gpr to the solenoid was unhooked from the solenoid. I hooked it up, threw a test light on the relay and it stayed on about 40 seconds, hit the key and it fired right up. Other than that and a windshield the truck needed nothing. I've driven it for a week now and put about 1,000 miles on it. Monday on my 30 mile drive home the battery light would come on and go off intermittently and would fade in and out. It would come on and go off for a while then do it all over again. I figured it was a bad connection on one of the battery cables and I would fix it this weekend. I parked it in the driveway tuesday after work and when I went outside this morning at 4:30 to start it, the truck just clicked. I carpooled to work and blew it off thinking it was just the alternator. Got home, took the alt off and took to the local parts store and it tested bad. I took the alt off my 95, bolted it on, hooked up jumper cables from my dads truck to mine and let it sit awhile and.... nothing, just a click. checked the cables, all were tight. swapped the brand new batteries out of my 95 into my 97 and still nothing. shorted the solenoid across, nothing. tapped on the starter with a small hammer while a friend hit the key and still nothing. just a click. I swapped the solenoid out from my 95 and it didnt even click then so i swapped em back out. checked the hot wire from the drivers side batt all the way to the starter and found no shorts or bad spots. every connection is tight. I checked the fuses in the power distribution box and they all looked good
. Im running out of ideas guys. Is there a fuse that could have blown and is preventing it from cranking? whats the possibility of the starter being locked up? the truck has 265k miles and I have no idea if the starter has been replaced or rebuilt recently. I was told the gpr could cause a direct ground so I immediately unhooked it and still nothing.
Any and all help will be greatly appreciated guys. I need to get the truck back on the road asap as I have a 100 mile 1 way trip coming up saturday morning. Thanks everyone