[Sparky dave]

You can find out which wire is positive and negative by just looking on these. Look for the dash light bulbs on the circuit board and you can follow the tracks on the circuit board all the bulb positives join together and go to a wire and all the negatives go together and become a black wire. I'm pretty sure the dash positive wire is pink but check first. Then touch the wires to your car battery or another 12 v battery