General Motors including Chevrolet car stereo wiring 1978 - 1990. Wiring harness terminal view.
Constant 12V+ Orange Switched 12V+ Yellow Ground Black Illumination Gray Dimmer Brown Antenna Trigger Pink Antenna Right Front Front Speakers 4" x 6" Dash Left Front (+) Tan Left Front (-) Gray Right Front (+) Light Green Right Front (-) Dark Green Rear Speakers 4" x 10" Rear Corners Left Rear (+) Brown Left Rear (-) Yellow Right Rear (+) Dark Blue Right Rear (-) Light Blue
Wire colors the same for Chevy Truck Stereo Wiring 1990s - 2000s. Harness style different.