1982-87 GM Wiring Harness
This harness prevents you from having to cut your vehicle's factory wiring harness when installing your RetroSound radio.
660 Wire Code Chart
Switched Power/Speaker Harness
Wire Color |
Function |
| Red | +12 Volt Accessory |
| Black | Ground |
| Blue | Power Antenna |
| Empty | (none) |
| White | Left Front Speaker + |
| White/Black | Left Front Speaker - |
| Gray | Right Front Speaker + |
| Gray/Black | Right Front Speaker - |
| Green | Left Rear Speaker + |
| Green/Black | Left Rear Speaker - |
| Violet | Right Rear Speaker + |
| Violet/Black | Right Rear Speaker - |
Constant Power/Illumination Harness
Wire Color |
Function |
| Yellow | +12 Volt Constant |
| Orange | Illumination |
Note: Please refer to product packaging for the most up to date country of origin.
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