When in doubt and you can't find the proper wire, use the Acc. wire in the main harness to the stering column. It will be Black/orange. Are you running a wiring harness adapter for the radio or are you just patching into the existing wires?

using an adapter, ten times easier [img]tongue.gif[/img]

I personally would solve the problem as there could easily be something else on the circuit. Did you notice if anything else was not working?
I third the "Ouch", take the seat out, it is cheaper than bending a piece of hardboard too far and having it break.