Installed a new compressor because the old one was froze up when I purchased the truck. Charged it up and it come on and worked fine for a few minutes. Then it went to kicking on and off and the longer I left it on the faster it got. I know there is a dual pressure swithch some where but I can not locate it. Does any one know what is going on with this thing? Also could it be this dual pressure switch, which I can not find. If any one know the location could you clue me in?