Liftgate Ajar Circuit Open

Possible Causes are:

Open the liftgate. Using the DRBIII(R) in Inputs/Outputs, read the LIFTGATE AJAR SW state. Does the DRBIII(R) display CLOSED? If yes, replace the Body Control Module. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS. If no, go to next step.
Disconnect the Right or Left Liftgate Ajar Switch harness connector. Using a 12-volt test light connected to 12 volts, check the Ground circuit. Does the test light illuminate? If yes, go to next step. If no, repair the Liftgate Ajar Switch Ground circuit for an open. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS.
Disconnect the Right or Left Liftgate Ajar Switch harness connector. Disconnect the Junction Block C1 harness connector. Measure the resistance of the Sense circuit. Is the resistance less than 5 ohms? If yes, go to next step. If no, repair the Liftgate Ajar Switch Sense circuit for an open. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS.
Disconnect the Junction Block C1 harness connector. Remove the BCM from the Junction Block. Measure the resistance of the Liftgate Ajar Switch Sense circuit across the Junction Block between the C1 connector and the Junction Block-to-BCM connector. Is the resistance less than 5 ohms? If yes, replace the Body Control Module. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS. If no, replace the junction block. Perform BODY VERIFICATION TEST VER 1 under VERIFICATION TESTS.