Hey, new user here.

A little background. I have a 2013 SR5 with the standard audio system. When I bought the thing I thought it sounded like garbage, but just figured yota skimped on it. After a couple months, the driver's side front stopped working. While fiddling with that, I realized the rear speakers don't work at all. With this shutdown, I decided I should at least upgrade the speakers and figure out what's up with it.

So I popped the door panels and off and to my surprise the factory speakers were replaced with some sort of 8 ohm 6.5 inch mids in all the doors, no tweeters even. The factory speakers in the hatch were still there. Total hack job install too. Drywall screws going willy nilly through the factory speaker mounts and stuff. I replaced everything but the rear speakers still don't work.

An important point: When I have the receiver faded all the way to the back and turn "party mode" on, the hatch speakers work. With party mode off, neither the rear door or hatch speaker works, on both sides. Just silence.

My first thought was it was these speaker selector relays that are activated by toggling the party mode switch. But after I thought about it, it seems the relay is working, since the hatch speakers work in party mode and not with party mode off. If the relays weren't getting power or were otherwise dead or my party mode switch was toast, toggling the party mode wouldn't effect the the hatch speakers and they would just never work.

So it seems like the problem is when the rear door and hatch speakers are wired in series (AKA party mode off). But I can't figure out where to even look to solve this problem. I find it curious that it's happening on both sides, and makes me worry that whoever owned this before (that installs speakers with drywall screws) did something that is making this happen. But I can't figure out where or how they could have managed this. Or why they would do it. the factory wiring on the rear door speakers was cut and spliced with a short piece of speaker wire to connect to the door speakers. But that shouldn't be an issue.

Does any of that make sense? Any ideas?

Thanks for any help. This looks like a great forum, looking forward to participating.