Honda Wiring Diagrams - FreeAutoMechanic Wiring Diagrams › Honda. If you run into an electrical problem with your Honda, you may want to take a moment and check a few things out for yourself. Before you dive in with a multi-meter, you will want to obtain a free wiring diagram for your specific model may need to locate a specific color wire Audio wiring diagrams?? | 9th Gen Civic Forum Dec 03, 2012No idea where to get the diagram, but basically you get to wire 3 main wires (+12V, GND, ACC) and 8 speaker wires on the 24-pinharness. All other wires are not meant to be used for aftermarket (some wires that I have no idea on what it is) and the rest (ie.