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2006 Chevrolet Silverado 1500 Turn Signals Don't Work when Headlights are on

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I upgraded all of my headlights, tail lights, etc. to LED. I upgraded the housings as well but am using the original wiring harnesses. I also installed a new flasher module that works with LED so I wouldn't have to install resistors. Additionally I had to replace the DRL sockets as the originals were shot. Everything works perfectly when the headlights are off but once the headlights are on the signals don't work and both turn signal indicators on the dash stay lit. I've done some reading and think it may be a bad ground but I have no idea how to fix. Any advice is appreciated. Thanks!


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Yes it's probably a bad ground , Ground locations are listed in Factory service manual or AllDatadiy. Probably somewhere near the lights on the rad support. Check the rad support  and sheetmetal to see if they are still grounded before chasing individual grounds. Test light is all you need

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