Hello 👋🏻 

I have an issue that happens at random. There’s a static popping/thud sound from the sub and speakers. Anything can trigger this, such as operating a window or the lights coming on, and even steering the wheel. Sometimes it can be a little crack, and others it’s a big thud from the sub. 

this has only started when a new stereo was installed. I’ve disconnected any wires that aren’t relevant for operation. A simple yet expensive option is to change the unit, but I want to avoid that and see if anyone has experienced this before, and maybe solved it. 
 

thanks!

Have you checked for the most obvious cause: a loose wire or connection shorting out?

One of the first things, yeah. But nothing happened when I moved things about. 

Did that include all earth connections?

No I don’t think so. I just connected the iso lead. And fed a live wire from the fuse box. 
how would I be able to identify an earth problem? Could be a good place to start. 

The extent of my electrical testing knowledge is to wriggle all the connections. Beyond that I can not help. Perhaps one of the wires you discarded as irrelevent is actually relevent after all.

It’s certainly worth another try. Could just be a problem with the stereo itself. Thanks for your help. 

Any progress on this Damian?