Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Need Help, Stereo fuzzed out with headlights on and normal when off!

Recommended Posts

Hello,(this is hard to explain, but bare with me) I have recently installed a new headunit for the truck as I wanted Bluetooth. I had a GM Lan for the onstar and dinging bells, I removed that and got a wiring harness because I don't use onstar or need the beeps in my truck. Noticed the music was fuzzed out so re wired everything again and triple checked everything was good and the same things happen so I called my electrician buddy to see what was wrong. And of course as soon as he tries it, it worked, thought all was good, until night with headlights on the auto it fuzzed again. So now when I turn the auto switch on or off it changes the audio.. I do not understand what is going on.


Long story short :

headlights on- music is fuzzed 

Headlights off- music is normal


Maybe it's the auto switch? Is there anyway to delete that.

I have unplugged all power to headlights, unplugged all fuses to do with headlights, and still no difference.

I would send a video but the size is to big

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.