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Try checking both a; your fuses, and b; check your bulbs. You should have two fuse boxes, one under hood and one in or under the dash. Check those for bad, blown or weak fuses. And check your headlights bulbs for them being good and their connection. If this doesn't fix your problem, you may check out your highbeam switch.
The problem is a Headlight module. Fuse box under the hood has two black modules side by side, the one on your right is the headlight module the one on the left is the fan module. Try swapping them, if the headlights work replace bad module, don't drive vehicle with the bad module in the fan slot. Mine kept going bad because I had a high intensity bulb on one side.
Is this both the high beams and low beams that do not work ?
If you checked all 3 fuses with a meter ( with the headlamp in Low position for both low beam fuses or in high for the high beam fuse ), the next items to test are the MFS ( MultiFunction Switch ) and the main headlamp switch ( test not look at it ).
sounds like the bulbs are burnt out, replace the bulbs and if they dont lite then check the fuses, sometimes the fuse blows when bulbs pop.you should be able to acess from under hood, remove cover, unplug headlight connector then remove clip holding light in, then pull light out,watch position of bulb coming out so that new one is installed the same way. hope this helps.
Sounds like you either have a bad headlight switch or a bad relay under the hood. Also you might want to try turning the lights on for a minute without the motor running,if they work with motor off then its probably the headlight switch.
I just had the same issues. No headlights, interior lights, power door locks, radio controls on steering wheel, or dash lights. Pulled every fuse in cab and under hood, not a one was bad. I disconnected the battery terminals for a few minutes. When I reconnected them every thing was working.