I’m trying to hook up an aftermarket radio in my girlfriends Scion xB (gen 2) because soda got spilled on it, and putting the new radio in I tested the bolts on the constant 12v and I’m getting no power to it. I tested the fuses and they all seem okay besides a few which I replaced but still didn’t give power, but from what I saw none of them but “panel” could have anything to do with the radio.

So my questions are
1) what might have been shorted out?

2) can I tap into a different constant from elsewhere that would be able to provide enough power without blowing fuses all the time?

3)could I if I don’t care about radio memory run the constant and accessory off of the accessory wire as a temporary fix while I figure it out?

thank you for any input on the situation, it’s much appreciated :)