It rained all day! So nothing happened at the carwash and I did not open the Hamilton ACW-5 entry unit to repair it in the rain.
Talked to a Hamilton tech support guy today about my broken credit card acceptor (acw-5) and they informed me that I have a bad main ground and need to replace the main wire harness (48-1011 $112.99). This is going to really take forever to change out and I hope they know what they are talking about!
I installed a new Hamilton credit card reader (acw-5) today and that reader did not work either. I called Hamilton tech support and they said it was a bad card reader. Later I noticed that when either card reader was outside of the housing the reader would work. Randy Nix of Eagle Car Wash told me there must be a ground issue and he was going to talk to a Hamilton tech tomorrow.