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Running light/gauge lights not working

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Old Jul 27, 2024 | 04:57 PM
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Default Running light/gauge lights not working

I have a 1978 blazer that has been in my family almost 30 years and all of a sudden it started blowing the tail lights/courtesy fuse. The interior lights work fine but when I replace the fuse as soon as I pull the headlight switch it blows it. I rewired the taillight harness because someone had spliced in a trailer plug and it’s still doing the same thing I have disconnected the headlight switch and made a jumper with a fuse and when I plug the jumper from power to the brown wire (parking, side marker and license plate) it blows the fuse I can’t find any kind of knick in the side marker wiring and i removed the license plate wiring when I did the taillight harness where else could I check to find the problem? Sorry I know this is a lot to read.
 
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