Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Block the Light Sensor in the Interior Rearview Mirror.
4. Shift the transmission to Drive (engine not running).
5. Wait two minutes.
6. With the scan tool, read the active DTCs.
  Does the scan tool display; B1F05-13-ELECTROCHROMATIC MIRROR CONTROL CIRCUIT - CIRCUIT OPEN as active?
  
  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 STANDARD PROCEDURE .
(P135) DRIVER AUTO DAY/NIGHT MIRROR SIGNAL OR (P136) RETURN CIRCUIT OPEN

Fig 1: Measuring Resistance Between Driver Auto Day/Night Mirror Signal Circuit & Driver Auto Day/Night Mirror Return Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror (C1) harness connector.
3. Measure the resistance between the (P135) Driver Auto Day/Night Mirror Signal circuit and the (P136) Driver Auto Day/Night Mirror Return circuit.
  NOTE:
  The resistance should clock up from approximately 25.0 Ohms to approximately 60.0 Ohms in about 10 seconds.
  
  Did the resistance clock up and stay under 100.0 Ohms?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open in the (P135) Driver Auto Day/Night Mirror Signal or the (P136) Return circuit. If the harness appears good, replace the Mirror in accordance with the Service Information. Refer to MIRROR, OUTSIDE REARVIEW, REMOVAL and MIRROR, OUTSIDE REARVIEW, GLASS, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .