Schematic:
I highly recommend building this out on a bench before trying to install in the car. Just need a battery source, ground, and multimeter testing continuity where the coil activation wire would be.
Also, if you're going to suffer through standing on your head in the passenger footwell to install a reset button like we did in the glovebox area, now is a great time to consider installing a footwell lighting kit (for cars with ambient lighting kits) and/or getting after the OnStar board.