i remember there being a write up floating around you need to splice 2 wires...done.
I got it on the Regal. How many bulbs you have? Anything that's just a parking light? The regal has the outter with originally is stop/turn and parking light. Then there were two more parking lights inside of that on teh trunk lid. Works out baller.
but it messed w/ your hvac, cruise control, and a few other things electronic wise inside the car