Fuel tank switch wiring?

[AKCody]

Doing some wiring troubleshooting today, found a red wire that runs on the drivers side along the framerail snapped in half. My service manual doesn't have a diagram that I can find on the tank switch. Has power in the on/run position. Thought about plumbing it in to the fuse panel. Any ideas?

 

[snicklas]

How big is the wire? Could it be a charge wire for a trailer......

 

[AKCody]

So wierdest thing. Looked like 12-14 AWG. I figured it was power for the selector valve and I hooked it into fuse panel with a 15a fuse and now my tank switch works

 

[IDIBRONCO]

Good find!