Ok. Now you need to determine which side of the circuit is not working.
Pull the dome light and disconnect the connector.
Test 1:
Attach the negative test lead of a voltmeter to the connector pin associated with the brown wire and connect the voltmeter positive lead to a constant 12V+ (at the positive post of the battery).
Does the meter read at least 12VDC? If not, you have a bad ground. If yes, move on to test 2.
Test 2:
Withe the positive lead of the voltmeter still attached to the positive battery post, attach the negative lead of the voltmeter to the connector pin associated with the brown wire with yellow stripe. Close, then open either door. Does the voltmeter read at least 12VDC? If not, the immobilizer is not recognizing that the door is open. Either way, move on to test 3.
Test 3:
Attach the negative lead of the voltmeter to a good ground (best to use the negative battery post). Attach the voltmeter positive test lead to the connector pin associated with the red wire with black stripe. Close, then open either door. Does the voltmeter read at least 12VDC? If not, then there is either something wrong with the immobilizer (consumer switched output) or you have bad wiring.
Report back with the test results and we can go from there.
