I need the wiring diagram for the rear fuel tank up to the tank switch for a 1986 F250. I've not been able to get a manual for the truck on eBay yet and can't seem to find the diagram online. Mostly what I need is the wire color for the sending unit on the rear tank so I can test the Ohm range.

Thanks!

 

Hope this helps

Edit: link to post, image not pasting...

https://www.ford-trucks.com/forums/s...11&postcount=3

 

Does anyone know where the tank selector relay is located on a 1986 F250? The wiring here seems simple enough I just need to know where to tie it in.

 

There's a relay, and the valve/relay.
The valve/relay is on the drivers side frame rail.
The relay is in the engine bay near the tire iron.

 

Looks like I need the tank selector valve/relay to get the lead coming in from the rear tank. Now I just need to find the best connection for the +12V when the key turns on and I'm set.