1990 Honda Civic Stereo Wiring Diagrams. About 1990 Honda Civic. 1990 Honda Civic Stereo Wiring Diagrams : 1990 Honda Civic Car Stereo Radio Wiring Diagram; Radio Constant 12V+ Wire: White/Blue; Radio Switched Ignition 12V+ Wire: Yellow/Red; Radio Ground Wire: Black; Radio Illumination Dimmer Wire: Red/Black; Radio Antenna Trigger Wire: N/A. Our comprehensive 1990 Honda Civic radio wiring diagram shows you all the radio wire harness colors, car speaker wiring colors and car speaker sizes. Use our 1990 Honda Civic head unit pin-out guide to help you with your car radio troubleshooting and installation needs.
1988-91 Honda Civic Stereo Wiring Constant 12V+ Blue/White Switched 12V+ Yellow/Red Ground Black Illumination Red/Black Dimmer n/a. 1988-91 Honda Civic Alarm, Remote Starter, Keyless Entry Wiring Information Constant 12V+. maybe we can make it a thread where we post all the wiring colors or diagrams for future reference instances. Understanding the Ins and Outs of 1990 Honda Civic Hatchback Radio Wiring Diagram The 1990 Honda Civic Hatchback Radio Wiring Diagram consists of four main connectors. These include a Power Antenna (white/yellow), a 12-pin connector, an 11-pin connector, and a 6-pin connector. The connectors are used to provide power and ground for the speakers.