Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. Operate the Cargo Lamp Switch several times.
3. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2.
  No
  - The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
HEADLAMP SWITCH SHORTED
1. With the scan tool, erase DTCs.
2. Disconnect the Headlamp Switch connector.
3. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 3.
  No
  - Replace the Headlamp Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(L914) CARGO LAMP SWITCH RETURN CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Cargo Lamp Switch Return Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Cluster C3 harness connector.
3. Measure the resistance between ground and the (L914) Cargo Lamp Switch Return circuit.
  Is the resistance below 5 Ohms?
  
  Yes
  - Repair the (L914) Cargo Lamp Switch Return circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4.
(L914) CARGO LAMP SWITCH RETURN CIRCUIT SHORT TO THE (Z910) GROUND CIRCUIT

Fig 2: Checking Cargo Lamp Switch Return Circuit Short To The Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (L914) Cargo Lamp Switch Return circuit and the (Z407) Ground circuit.
  Is the resistance below 5 Ohms?
  
  Yes
  - Repair the (L914) Cargo Lamp Switch Return circuit for a short to the (Z407) ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .