How to Install a Stereo on a Motorcycle | It Still Runs Run standard audio power wiring from the batter under the seat on your motorcycle, up to the stereo system. Run the wiring under the tank; try to conceal it completely. Use electrical tape to secure the wiring every 4 to 5 inches on the way to the stereo. Bundle and tape any extra wiring and tuck it under plastics or framing. Dan's Motorcycle "Wiring Diagrams" Usually, not always, just usually, the hot wire from the battery is a red one. This hot wire can run all over the motorcycle with other different colored wires going from the hot wire to the Power Destination/Device. This is why there are so many colors of wire.