3800 Swap AC Compressor Output From PCM Won't Engage (Page 2/2) olejoedad APR 02, 12:31 PM Just a thought after rereading this thread..... It could simply be a relay with a bad coil. Try another relay. Goldmember MAY 02, 06:58 AM I finally got back to working on this. It ended up being a bad connection in the AC compressor relay plug. Thanks for all the help! olejoedad MAY 02, 07:09 AM Awesome! Thanks for checking back in and letting us know what the problem was!