LED Ground effects kit for your car

Step 6 Wire the LED strands

Remember that hole in the firewall from step 2? We're going to use that now. If your car doesn't have a vacant one already, either piggyback one that already has wires going through it or drill your own hole.

Since every car is different, you're going to have to come up with your own way to snake some double-strand wire from the cabin to the bottom of your car. Generally though, there should be an opening straight to the bottom near the front left wheel well (for countries that drive on the right, it'd be the right wheel if you're across the pond :-P). Tie a loop of string around the end of the wire, then feed about a foot of the wire through the hole. You should be able to see it when you look under the hood.

Take a coat hanger, or perhaps using your hand, grab the end of the wire from underneath your car and pull it through. Duct tape it to the bottom of your car to keep it from going anywhere (you can take off the loop now).

Run wire from each of the LED strands and wire them all in parallel (red to red, black to black) and solder the whole mess together. I'd recommend using liberal amounts of electrical tape as well. Once again, stay away from hot components.

Make sure to leave 1-2 feet of wire inside the cabin.