Audio Wiring / September 6, 2018 / Maggie Pimentel.
The first wire you should run is from the battery to the trunk. Install a fuse on this wireless than 18″ from the battery terminal. If something happens, the fuse will blow close to the battery before anything can happen. The fuse holder can use install on the driver’s side strut tower.
Use a self-tapping sheet metal screw and drill through the metal on the backside of the seat or into a part of the trunk floor NOT IN CONTACT with the gas tank. Remove the screw, and grind off any paint around this area. You want a conductive connection to the chassis. Drill the screw back into the hole you created, this time with the ground wire attached. Use some silicone sealant to seal up the bare paint area to prevent rust.
Gather the following tools: knife or wire cutters, solder, and solder gun, crimps, stripper, screwdriver, screws. Plan the installation. Know where you intend to put all the components. For example, the radio commonly placed in the factory opening in the dash, the speakers are put in the factory openings in the front doors, and the rear speakers put in the factory openings on the back deck. The equalizer goes in the factory opening below the radio in the dash. An amplifier with built-in electronic crossover usually goes in the trunk. The car’s battery, which powers the system, is commonly under the hood, usually on the passenger’s side of the vehicle.
Connect the Power and RCAs, then reconnect the negative battery terminal. Re-install the head unit and play some music, making sure everything is connected correctly.