I just bought a new Pioneer Avic headunit which I put in my 2002 WRX, however after installing it the headunit won't power on!
So.. I pulled out the headunit and grabbed my trusty multimeter. I started testing the pins in the stock radio harness and it seems that I get 12V in the correct wire when the key is turned to ACC, however the wire that is supposed to be 12V Constant seems to be dead all the time... I checked all the other pins just incase the aftermarket harness I got was mapped wrong, but nothing. I also tried replacing the fuse for the radio but still no voltage in anything but ACC.
I'd really like to avoid going to the dealer/mechanic but I'm really not sure what else to do. Any thoughts?