Long road here.
Been trying to get my long dead AC system back up and running on my 1994 Voyager.
All the mechanicals are now brand new.
They were able to charge the system without a hitch, but they can only engage the AC by jumping the solenoid through the computer, it will not engage via the button on the dash.
They have tested both the high and low pressure switches and they are functioning properly. They have signal coming from the switch on the dash. The ECM however will not send signal to turn on the AC unless they go in manually.
They’re trying another switch and ECM today, but are doubtful it’ll work.
Anyone have any ideas we’re overlooking?