Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 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 - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  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. Refer to MODULE, POWERTRAIN CONTROL, 6.7L DIESEL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .