Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - LOW BEAM HEADLAMPS INOPERATIVE
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the Low Beams on. Do the Low Beam Headlamps operate properly? Yes --> The condition is not present at this time. Monitor DRBIII parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring harness and connector terminals. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 2 |
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| 2 | Remove the Low Beam Relay from the Junction Block. Install a known good relay in place of the Low Beam Relay. With the DRBIII®, actuate the Low Beam Relay. Do the Headlamps flash while actuating the Low Beam Relay? Yes --> Replace the Low Beam Relay. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 3 |
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| 3 | Remove the Low Beam Relay from the Junction Block. Measure the voltage of the Fused B(+) circuit at the Low Beam Relay connector. Is the voltage above 10.0 volts? Yes --> Go To 4 No --> Repair the open fused B+ circuit. Perform BODY VERIFICATION TEST - VER 1 . |
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| 4 | Remove the BCM from the junction block. Connect a jumper wire between the Fused B(+) circuit and the Low Beam Relay Control circuit at the Low Beam Relay connector. Measure the voltage of the Low Beam Relay Control circuit to the BCM Junction Block connector. Is the voltage above 10.0 volts? Yes --> Go To 5 No --> Repair the Low Beam Relay Control circuit for an open condition. Perform BODY VERIFICATION TEST - VER 1 . |
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| 5 | Disconnect the jumper wire. Reinstall the Low Beam Relay in the Junction Block. Remove the BCM from the junction block. Measure the voltage of the Low Beam Relay Control circuit to the BCM internal connector. Is the voltage above 10.0 volts? Yes --> Replace the Body Control Module. Perform BODY VERIFICATION TEST - VER 1 . No --> Replace the Low Beam Relay. Perform BODY VERIFICATION TEST - VER 1 . |
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