Tail lights not working!

2003 GMC SONOMA
210 MILES
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PASHLEE51
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When headlights are on the tail lights are not coming on. The brake lights, turn signals, everything else is working checked the fuses and changed the bulbs, what else could it be?
Apr 20, 2013 at 5:58 PM
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ASEMASTER6371
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re check all fuses with a test light.

could be either a headlight switch or wiring

roy
Apr 20, 2013 at 6:10 PM
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PASHLEE51
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How do u do that the test light don't fit in the hole the fuses came out of do u understand what I'm saying?
Apr 20, 2013 at 6:18 PM
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ASEMASTER6371
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the test light touches the top terminals of the fuse. you test for power on both sides of the fuse.

Roy
Apr 20, 2013 at 6:20 PM
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PASHLEE51
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Thanks I understand now
Apr 20, 2013 at 6:26 PM