Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

INTERMITTENT CONDITION
1. Turn the ignition on.
2. Clear all Cluster DTCs.
3. Turn the Driver Reading Lamps on.
4. With the Scan Tool read the DTC information.
  Does the Scan Tool read: B161F-READING LAMP CONTROL CIRCUIT LOW?
  
  Yes
  - Go To 2
  No
  - The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
  - Perform the BODY VERIFICATION TEST - VER 1. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
(M27) READING/RAIL LAMPS DRIVER

Fig 1: Checking Reading/Rail Lamps Driver Circuit For Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C3 harness connector.
3. Measure the resistance between ground and the (M27) Reading/Rail Lamps Driver circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (M27) Reading/Rail Lamps Driver circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST - VER 1. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Replace the Cluster in accordance with the service information.
  - Perform the BODY VERIFICATION TEST - VER 1. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure