Hi all. I have a question that I fear I wont be able to solve without money. I have a 2002 Mazda Miata, with 2 6.5" 2 ways running through an amp. Everything was working as it should. I wanted a different head unit. So, when I went to wire it in, instead of disconnecting the battery and taking the car side harness out, I cut and spliced it right there in the radio bay. Now the headunit won't power on. I tried wring the old one back in, and it wouldn't power on. I tested the new one on another power source and it will power up. I checked the radio fuse, and it wasn't blown. So, what is the next place to look? What would cutting and splicing with the harness hooked up and the battery connected do? Thanks for your time! Jason