also, so I know the compressor works and I'm beyond the lower limit of the hi/low pressure switch. All the interior controls work it's just the compressor is not engaging. I really haven't troubleshot it too much as I've been putting everything else together and working out some other bugs. The corrosion in the battery area was the result of a failed battery that killed the ecu and I'm thinking the a/c amp too. If not then I have a spare a/c controller and I'll go into the self diagnostic mode further. I just haven't spent much time on it to now.