[cwl1979]

My 12V compressor hasn't worked since i got the coach. I'm just about finished with rebuilding my Aqua hot and thought since the compressor is right there i should deal with that while i wait for parts. I figured I'd take out the 12V compressor. I undid the airlines and cut the wires with enough to splice back into and proceeded to google. Mine is a Thomas compressor and costs about 975 at Grainger.  To which i thought... wonder what's wrong with mine and took the whole thing apart. Piston wasn't seized, so i cleaned everything up, applied a drop of oil to ease reassembly and ... still nothing! darn! Took the rear cover off the electric motor and saw the positive contact was corroded. Cleaned that up reassembled the motor and... Success! Purrs like new! Fresh coat of paint and ready for install in the morning! 

Sorry i didn't take step by step pictures but here's a few i did take. 

For anyone that may have the same compressor Grainger sells a rebuild kit for 185 is comes with a piston and new O rings and filter and intake an exhaust reeds. It did not look like the kit had brushes or contacts.