Set the LED strip underneath your vehicle. Now is a good time to see if the underside of your car has any way of securely attaching the LED strips, including bolts, brackets or other small openings. Secure the LED strip with zip-ties.
Extend the wires. Route the 4 wires up to the engine bay and connect them to the module box. If the wiring of the LED strip on the rear bumper is not long enough to reach the front of the vehicle, you may use the extension wires that come with the package.
Tap the Red wire to battery positive/Black wire to negative or ground. If there is an optional wire, check the installation sheet to see what it's for.
Place the module box close to the battery, but away from the engine so there is no risk of damage. Make sure the location you place the module box at will be dry at all times. The battery/fuse box location is designed to stay perfectly dry so you don't have to worry about damaging the module box. Extend the antenna on the module box so you can get better reception even if the hood is closed.
Test to make sure everything works and enjoy your set of underbody LED lights. You can see that the installation was pretty straightforward so you will be well on your way to being the coolest and most colorful car on the block.