well i got my dash ripped out and my HU aint workin still i hooked up everything and checked but the red wire (acc) isnt hot, its not getting any power, i have an 02 trailblazer, and a guy on some forums said that the shop had to tap the acc wire at the steering wheel harness, how would i go about doing that, or could i justr hook up the acc wire to my baettery wires, like just tape all 3 together, that probably would mess something up, or could i do that?