I have a 1990 F-250 with the 460. I have not had it very long. I am currently working on a no front fuel tank feed problem. Sometimes it works some times not. I believe I am getting to the root on that problem.
There is a switch on the dash that I am not sure of what it's purpose is. It is located right of the steering wheel and inline of the selector switch. There is an up arrow and a down arrow. I have pushe the switch in both directions. With the key on and off, but nothing happens. ANy ideas or suggestions on what it could be?
Thanks.

 

That sounds like its for a power rear window.

 

That sounds reasonable. Kinda useless in my truck but none the less useless as I have a sliding window, LOL.

 

Soinds like that part of your dash was replaced with one out of a Bronco. None of these pickups had a power rear window, but the Bronco did.

 

I think the rear window switch on my '88 Bronco was left of the steering wheel though.

 

Could we get a pic of the switch? The Bronco does have an up/down rear window switch with arrows but it is on the left side of the steering column right next to the rear window defroster switch. Those 2 switches on the Bronco are in the same pod where the tank selector switch goes on an F-Series pickup.