just visit installdr.com for more info, they have a break down of a honda/acura harness under the link on the homepage that says 'quick radio wiring info'. You can confirm the wires that are in this harness out of the car side and also the colors from that car that correspond to +12v constant, etc. PlastikOwl gave you the wire colors out of the radio. These wire colors are not on the car side, they are different wire colors. if he did mean the colors coming out of the radio, the blue wire is a remote turn on wire for external amps. as i posted before, make sure the 12 volt constant wire out of the radio is goin to the 12 volt constant wire out of car. Hope this helps.