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.

PCM GROUND CIRCUIT(S) OPEN
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Using a 12-volt test light connected to 12 volts, probe each (Z915) PCM ground circuit (terminals 49, 50, 51, 52, and 73) at the PCM C2 harness connector.
  Did the test light illuminate (as brightly as direct connection to Battery) for each cavity?
  
  Yes
  - Go To 2
  No
  - Repair the PCM Ground circuit(s) for an open.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT
1. Using a 12-volt test light connected to ground, probe the (F942) Fused Ignition Switch Output circuit (terminal 5) at PCM C2 harness connector.
2. Turn the ignition on.
  Did the test light illuminate (as brightly as direct connection to Battery)?
  
  Yes
  - Go To 3
  No
  - Check the (F78) 10A Fuse for an open. Check the Run/Start Relay for proper operation. If the fuse and relay test good, repair the (F942) Fused Ignition Switch Output circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (A209) FUSED B+ CIRCUIT
1. Using a 12-volt test light connected to ground, probe the (A209) Fused B+ circuit (terminals 1, 25, 26, 27, and 28) at the PCM C2 harness connector.
  Did the test light illuminate (as brightly as direct connection to Battery)?
  
  Yes
  - Test Complete.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Check the (F22) 30A Fuse for an open. If the fuse tests good, repair the (A209) Fused B+ Output circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .