2005 launch ssv stereo and ballast pump issue

I seem to be having an issue when I have the stereo on and hit both rear ballast pump switches at the same time. as soon as I hit both the stereo shorts out and my perfect pass reboots and the pumps don't work. I have to turn the stereo toggle switch off as well as both pump switches wait a few seconds and turn them back on and it works fine again. I assume it would be a short somewhere but just reaching out to see if anyone has an idea of direction to go with that. thanks!

Sounds like a low voltage issue. Could be alternator, bad battery or corroded cable or terminal/loose termination.

Need to find the point at which all the effected systems have in common.