How to check the for signal from Control Head calling for compressor to turn on? How to check for signal from BCM to ECM. Have ACC control head. How to check if AC pressure switch is not working? I know compressor clutch is fine coz it will engage if I short the ECM AC power control relay to ground.
Where to find an accurate schematic of the Control Head to BCM circuit for the proper connectors? The Saturn HVAC service manual I have gives different wire colors and positions on those connectors than what is under the dash so I am totally confused!
Tuesday, July 23rd, 2013 AT 9:27 PM