Diagnostic Test

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

TEST FOR INTERMITTENT CONDITION
NOTE:
Make sure any aftermarket or trailer tow accessories are disconnected from the Trailer Tow Connector.
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. Turn on the Right Turn Signal.
4. With the scan tool, read DTCs.
  Does the scan tool display DTC: B17B2-REAR RIGHT TRAILER TURN LAMP CONTROL CIRCUIT LOW?
  
  Yes
  - Go To 2.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (L656) RIGHT REAR TURN SIGNAL CONTROL CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS

Fig 1: Checking Right Rear Turn Signal Control Circuit For A Short
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the TIPM C7 harness connector.
3. Disconnect the Trailer Tow 7-Way Wiring harness connector.
4. Measure the resistance between ground and the (L656) Right Rear Turn Signal Control circuit.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 3.
  No
  - Repair the short to ground in the (L656) Right Rear Turn Signal Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE TRAILER TOW CONNECTOR FOR AN INTERNAL SHORT TO GROUND
NOTE:
This measurement is taken at the Trailer Tow Connector used by the customer. Use the diagram on the Trailer Tow Connector cover to determine the correct terminal.
1. Reconnect the Trailer Tow 7-Way Wiring harness connector.
2. Measure the resistance between ground and the (L656) Right Rear Turn Signal Control circuit at the appropriate terminal in the Trailer Tow Connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information. Refer to MODULE, Totally Integrated Power (TIPM) , Removal .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Trailer Tow Connector in accordance with the Service Information. Refer to CONNECTOR, Trailer Tow , Removal .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .