Question about 2002 Cadillac DeVille DTS

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I have a 2002 Cadillac DTS. The right headlight is out when the ignition is on. However, it will come on when I unlock the car with the remote! But not if the car is running when I click the remote. A

Bulb okay, ground okay

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Each headlight lens assembly has two bulbs - did you check both? These bulbs are used independently in different ways depending on the commanded tasks [e.g. unlocking car, car running during daytime with running lights (if equipped), headlights on (auto or manual - low or high beam)].
If both bulbs check out, I would replace them one at a time anyway just to be sure. It is not uncommon for a bulb to show a good resistance reading with a multimeter and then go open under full load. Also verify the bulbs and the wiring harness connector are seating properly.

Posted on Dec 07, 2014


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