Tailgate Ajar Circuit Open

Possible Causes:

• Body Control Module Internal Malfunction
• Tailgate Ajar Switch
• Tailgate Ajar Switch Sense Circuit Open

Testing

1. Disconnect the Tailgate Ajar Switch connector. Connect a jumper wire between the Sense circuit and the Ground circuit. With the DRBIII(R) in Inputs/Outputs, read the TAILGATE AJAR SW state. Does the DRBIII(R) display CLOSED? If yes, replace the Tailgate Ajar Switch. Perform BODY VERIFICATION TEST  . If no, go to next step.
2. Disconnect the Tailgate Ajar Switch connector. Disconnect the BCM C1 harness connector. Measure the resistance of the Sense circuit between the BCM connector and the Tailgate Ajar Switch connector. Is the resistance below 5.0 ohms? If yes, replace the Body Control Module. Perform BODY VERIFICATION TEST  . If no, repair the Tailgate Ajar Switch Sense circuit for an open. Perform BODY VERIFICATION TEST  .