Thank you. I should have remembered that. I had to replace the glow plug relay on a 97 I used to haveThe two on top of the engine are the glow plug relay, and the intake air heater relay.
The one on the passenger fender is the starter relay. The starter solenoid is on the starter itself
I had the same problem, mine sat for four years, cause no one could figure out,..... Accidentally discovered it was the fuse block next to the steering column. Apparently on these trucks water gets in around the windshield and ends up behind the fuse block. I replaced it, and bam..... Fired right up. .... Hope this helps2001 F-350 7.3: I thought the batteries were dead, but they are fully charged. I've got NOTHING. No guages, no horn, can't jump the solenoid. I replaced the start switch just over a year ago. Where to begin?