Theres 2 relays in the fuse panel on the side of the dash....try switching those 2 around. My window gave me problems after an alarm instal, it ended up being a plug under the dash. Get under there and unplug everything and plug it back in.
^I was thinking of that too, just make sure you get it right, replacing regulators can be a pain and expensive :imo.
Swap the switch, or your regulator motor could be bad, are you getting power to the switch? It takes like 2 minutes to take the door panel off. This truck has always been one of my favorites ever since I started le forums atriot:.