I'm gonna lose it. I've spent SO MUCH TIME out here trying to make this damn system work. 

it's a 2023 Mazda cx-5, non Bose. 

Copilot(I know, ai is yalls nightmare)  just told me I'm getting feedback on the tweeter because I created a ground loop with my LP7-4 Loc by connecting the ground wire to my grounding block in the rear - where my #4awg (OFC) goes to my subwoofer and 4 channel amp. Apparently it doesn't require a ground at all??

The ground location itself in back has 0.1 resistance. 

And I CANNOT GET ANYTHING TO WORK!? There's the feedback on my front right A pillar tweeter, but I'm getting 0 voltage from my LOC. 

I just installed the kicker kisload4 thinking that's why I only got 0.3 volts from the LOC last night...now with the kisload4 installed, I get 0.0 volts on any channel. 

It's also....not connected to any speakers lol.

There's nothing connected running to the amp right now,  just male harness in the factory TAU , hooked to kisload4 input, that then connects to my lp7 LOC. I've tried testing voltage before the kisload4, directly after it, and then the RCA output side of course on the LOC. 

I'm close to giving up, seeing if D4S will take the amp back, just just go back to my stock sounding aftermarket speakers. 

Oh my GOD, can someone please help me with this insanity.