Are you fricking kidding me!!
I was about to either lift bed or curbs hike in bed of truck so I could have access to the fuel pump in the tank. As I was under truck, figuring out the best option, I noticed a fuse holder near to top of the tank and the frame rail, with a blown fuse in it. Replaced fuse and truck fired right up!
Looked like someone had added it, but I don't know why, it serves no purpose, there is a factory one under the hood. There is a bare spot on the wire, I'm assuming it grounded out on the frame and popped the fuse.
I took it out completely and butt spliced and heat shrink wrapped wires.
Took 5 minutes to fix!
I crawled under truck at gulches, but didn't see it.
Damn do it yourselfers!
At least I found it before I replaced something that wasn't broke!