[F.A.A.benny]

But to help answer your question. Its a little difficult to test just the compressor while on the truck. Well at least for me anyways. I use to work for a company only does classic car a/c restoration and when we got a compressor in we would bench test it by putting it under load and check how well it sucked and pumped. I guess you could do that on the truck but you would have to disconnect the hoses from it