I just bought an H3 for my mobile electronics and automotive detailing company's show car. It had the monsoon system and a DDX616 head unit but the speakers sounded blown or out of phase, the tweeters and sub were like non-existent, and it had no memory when I'd shut off the ignition so it'd go through set up each time I'd start the truck.

I've got it all soldered and sorted out now. the only things that were really connected to anything were 12v ignition, ground, and the 4 door speakers...

 

All that rats nest could have been avoided with a simple plug-n-play harness.

What some people will do to save $15 .