Stereo wiring diagram needed?

1980 PONTIAC GRAND PRIX
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RONGURGEL
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What's the hot on factory plug? Clock wire? The vehicle listed above is a GP model.
Jan 15, 2025 at 11:13 AM
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STEVE W.
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1980, that was when GM still had the 3-plug system and the extra connection on the back if the info I have is correct. The 12-volt switch is yellow, the full time hot is orange. The images should give you the rest.
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Jan 15, 2025 at 11:40 AM