Car Wiring Diagram warns: please do not attempt a car amp installation if you are not comfortable with the process. Leave it to a professional. Now here are the steps on how to install a car amp. There is also a wiring diagram below. These directions assume you have already physically mounted your amplifier to a solid, non-conductive surface (non-metal). If you have not purchased your power wiring be sure to read this article on choosing wire gauge for amplifiers.Attentively study our management and car wiring diagramme.1. Determine what side of the vehicle the battery is on. Disconnect the negative battery terminal. If you have a radio with a security feature (such as a Delco-Loc or Eclipse ESN) make sure you know the reactivation code before disconnecting the negative battery terminal...