Ok guys I'm tryin to fix my buddy's 05 6.0. Its overheating and he's in Iraq. He took it mud boggin a lot before he left. I pressure washed it yesterday and washed a lot of mud out of the radiator. I know it helped but the truck still runs hot. When I was looking it over I had the ac running and noticed the fan wasn't running very strong. Is there anyway to check the fan switch? Also is there anything else I can check?