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2005 Buick LaCrosse Question: headlights



, 3.6L V6, Columbia, SC, May 08, 2011, 17:53

high beam only, replaced bulb, not the problem. low beam lights will not come on. been checked, not in headlight what could problem be?

2 Answers
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  • Answer #1

    May 09, 2011, 01:51

    You will need to check for power at the sockets when the switch for low beam is activated. If there is no power, you will need to get a wiring diagram and start back testing the wires to see where the voltage drop occurs. It could be a switch issue, for example.

    To get some wiring diagrams, you could sign up at one of these following two web sites:



    If you acquire your own access to either ALLDATA or Mitchell One repair manuals you can get wiring diagrams that you will need to follow to check the wiring.

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    , March 07, 2012, 14:30

    Have checked at low beam lights. No voltage. Power goes through multifunction switch. Bulbs are new and fuses are good. Power leaves switch and goes into a module. Can't get any power out. Only thing affected is low beams. Everything else works.

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  • Medium-star Best Answer
    April 12, 2012, 00:15

    #35 in black box under hood. Solid state power supply for lights has failed.

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