Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Check The (C13) A/C Compressor Clutch Control Circuit For A Short To Voltage
1. Turn The Ignition Off.
2. Disconnect The PCM C2 Harness Connector.
  NOTE:
  Check Connectors - Clean/Repair As Necessary.
3. Turn The Ignition On, Engine Not Running.
4. Using A Voltmeter, Measure The Voltage On The (C13) A/C Compressor Clutch Control Circuit At The PCM C2 Harness Connector.
  Is There Any Voltage Present?
  
  Yes
  - Repair The (C13) A/C Compressor Clutch Control Circuit For A Short To Voltage.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .
  No
  - Go To 2
Powertrain Control Module
1. Reconnect The PCM C2 Harness Connector.
2. Using A 12-Volt Test Light Connected Battery Positive, Probe The (C13) A/C Compressor Clutch Control Circuit At The Powertrain Distribution Center (Pdc) A/C Clutch Relay While Actuating The A/C Compressor Clutch With The Scan Tool.
  NOTE:
  The Test Light Must Illuminate Brightly.
3. Compare The Brightness To That Of A Direct Connection To The Battery.
  Does The Test Light Illuminate Brightly?
  
  Yes
  - Replace The A/C Clutch Relay In Accordance With The Service Information.
  No
  - Replace The Powertrain Control Module In Accordance With The Service Information.
  - Perform The POWERTRAIN VERIFICATION TEST. Refer To POWERTRAIN VERIFICATION TEST .