Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CHECK THE BRAKE SWITCH CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Brake Switch harness connector. Inspect the terminals and connector for damage, corrosion, etc.
3. Disconnect the PCM C2 harness connector. Inspect the terminals and connector for damage, corrosion, etc.
  NOTE:
  Check connectors - Clean/repair as necessary.
4. Measure the resistance between the brake switch circuit in the PCM C2 harness connector and ground.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the Brake Switch circuit shorted to ground.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 2.
CHECK FOR THE BRAKE SWITCH CIRCUIT SHORTED TO OTHER CIRCUITS IN HARNESS
1. Measure the resistance between the Brake Switch wire in the PCM C2 harness connector and all other pins in the PCM connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair or replace the harness.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 3.
POWERTRAIN CONTROL MODULE
1. Reconnect the PCM C2 harness connector.
2. Measure the resistance between the Brake Switch circuit at the switch connector and ground.
  Is the resistance below 10.0 Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Go To 4.
CHECK THE BRAKE SWITCH
1. Reconnect the Brake Switch connector.
2. Using the scan tool, clear the DTCs.
3. Turn the ignition on.
4. Cycle the brake pedal several times.
5. Using the scan tool, read the DTCs.
  Has the Brake Switch Low DTC returned?
  
  Yes
  - Replace the Brake Switch in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Perform the INTERMITTENT CONDITION - 6.7L diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .