I can pick up a test light after work and test the wires.. When I removed the wires from the shovel (license plate light) I assumed the blk/white was ground because it was mounted to the side of the bulb, but after blowing a fuse I thought maybe I was wrong.
I should just be able to twist the two black LED wires together and connect them to the blk/white and twist the two red wires from the LED's, connect them to the grey and be in business, but either I'm doing something wrong or maybe the wires themselves are shorted out.