93 sentra deck installation help

I removed the stock deck from my '92 Sentra because it wasn't working, only to find the red wire labeled "turn on +acc" dangling, disconnected from somewhere in the dash. I have absolutely no idea where it's supposed to be connected to. Can someone please point me in the right direction? It would reaaaaaally make my day.

+acc is a positive lead that comes on with the ignition. Check for any bare wires so not to ground out anything. To check wires or connectors get a light tester so you can determine positive wires from ground wires.
The +acc wire you found goes to a positive source that only comes on with the ignition. So when you find a wire that lights up the tester with the ignition on, turn off the key to see if the light goes off. If the tester light goes off then its an accessory (+acc) lead.

just look for any spots that looks like its missing a wire on the wiring harness and or on the radio and test it just be sure its not being connect to the ground or youll be needing a new battery and some fuses possible