Car Stereo Radio Wiring Diagram - 1999 Ford Mustang Car Stereo Radio Wiring Diagram – 1999 Ford Mustang 2 Replies to “Car Stereo Radio Wiring Diagram – 1999 Ford Mustang” Gary says: March 31, 2011 at 9:28 pm . I have a 99 mustang GT convertible. when following the wiring diagram here there seems to 1999 Ford Mustang Car Stereo Wire Colors and Locations 1999 Ford Mustang car stereo wire colors, functions, and locations 1999 Ford Mustang Stereo Wiring. Home / the12volt's Install Bay / Vehicle Wiring / View all Ford Vehicles / 1999 Ford Mustang Vehicle Search: Manufacturer: Select Vehicle Manufacturer Speaker Wiring/harness diagrams Only please - Ford Mustang Speaker Wiring/harness diagrams Only please Audio, Video, Navigation & Alarms. WIRING INFORMATION - FORD / MUSTANG / 1999 / COBRA / AUDIO my 01 mustange gt i just bought it the radio turns on and functions correctly but im not getting any sound out of the speakers and may mention its all factory. can anyone 1999 Ford Mustang | Stereo Wiring Diagram 1999 Ford Mustang. July 15th, 2012 Posted in Ford Mustang. 1999 Ford Mustang Stereo Wiring Information. Radio Constant 12V+ Wire: Light Green/Purple Radio Switched 12V+ Wire: Black/Pink The stereo wiring diagram listed above is provided “as is” without any kind of warranty.