Question about 2002 Chevrolet TrailBlazer

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Headlights turn off at night on their own. High beams work but not the basic headlights. It only occurs at night.

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There are two relays under the hood in your power distribution box one for low beam and one for high beam . Look under the box lid and see which one is which and replace it .. if you have to refer to your manuel in glove box to figure which relay is which. The box under the hood is like 3 inches by 8 inches and black in color .. hope this helps Jerry

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

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There is a relay that controls the headlights, volvo calls it a step relay. You will have to check that power is getting to this relay. If not, check all fuses and wiring. If power supply checks out ok, you may have to replace the relay. Let me know if you need any more info or a wiring diagram.

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