1990 Mazda Miata Car Audio Wiring Install Instructions Whether your an expert Mazda Miata mobile electronics installer, Mazda Miata fanatic, or a novice Mazda Miata enthusiast with a 1990 Mazda Miata, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 1990 Mazda Miata vehicles are becoming increasing more difficult to identify due to the installation of Read More Read More 1990-93 Mazda Miata Car Stereo Wire Colors and Locations 1990-93 Mazda Miata car stereo wire colors, functions, and locations 1990-93 Mazda Miata Stereo Wiring. Home / the12volt's Install Bay / Vehicle Wiring / View all Mazda Vehicles / 1990-93 Mazda Miata Vehicle Search: Manufacturer: Select Vehicle Manufacturer 1990 Miata Project Episode 12 - Stereo Swap Install Click to view on Bing15:091990 Miata Project Episode 12 - Stereo Swap Install Frustration project 1990 Mazda Miata [part 10] NEW STEREO AND OTHER GOODNESS! 1990 Miata Project Episode 11Author: goodeggproViews: 19K 1991 Mazda Miata | Stereo Wiring Diagram 1991 Mazda Miata Speaker Sizes. Audio Front Speakers Size: 6 1/2″ Speakers Audio Rear Speakers Size: 3 1/2″ The following information is currently not available: Stereo Dimmer Wire Stereo Antenna Trigger Stereo Amp Trigger Wire *If you know any of the above or any other missing information please use the comment box below to notify us.