VTSS Indicator Inoperative

Possible Causes are:

• OPEN VTSS INDICATOR
• FUSED B (+) SUPPLY OPEN
• VTSS LED
• VTSS INDICATOR DRIVER CIRCUIT OPEN
• BODY CONTROL MODULE OPEN INTERNAL VTSS DRIVER

1. Disconnect the Automatic Headlamp Light Sensor/VTSS LED harness connector. Measure the voltage of the Fused B+ circuit. Is the voltage more than 10 volts? If yes, go to next step. If no, repair the VTSS Fused B+ circuit for an open. Perform VTSS VERIFICATION TEST 1A  under VERIFICATION TESTS.
2. Disconnect the Automatic Headlamp Light Sensor VTSS/LED harness connector. Using a 12-volt test light connected to 12 volts, check the VTSS Indicator Driver circuit. Turn ignition on. Using the DRBIII(R) in Vehicle Theft, actuate the VTSS Indicator lamp. Does the test light illuminate when the VTSS Indicator lamp is actuated? If yes, replace the Automatic Headlamp Light Sensor/VTSS LED assembly. Perform VTSS VERIFICATION TEST 1A  under VERIFICATION TESTS. If no, go to next step.
3. Disconnect the Automatic Headlamp Light Sensor/VTSS LED harness connector. Disconnect the BCM C1 harness connector. Measure the resistance of the VTSS Indicator Driver circuit. Is the resistance less than 5 ohms? If yes, replace the Body Control Module. Perform VTSS VERIFICATION TEST 1A  under VERIFICATION TESTS. If no, repair the VTSS Indicator Driver circuit for an open. Perform VTSS VERIFICATION TEST 1A  under VERIFICATION TESTS.