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Old 07-24-2018, 05:09 AM   #1
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Default Speaker Wires in Truck Different from Wiring Diagrams

Hello, I'm wiring a stereo into my '89 D21 but the factory Rear Speaker wires do not match the colors I'm finding on wiring diagrams I've been finding online. The right rear speaker wires are Grey and Grey/White, but this is not what they should be according to all of the diagrams I've found thus far. I don't remember what the rear Left speaker wire colors were, but I know they were different too. The front ones matched though, which is why I'm confused. I just need to know which ones are the positives and which are neg so I don't get the polarities wrong. I also wouldn't mind finding out why my truck doesn't seem to match the documentation...Any thoughts??

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Old 07-24-2018, 12:49 PM   #2
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The FSM shows gray and gray/red for the right rear. It shows green and green/black for left rear. You can check the polarity with a 9v battery. If you connect it with the polarity correct, the speaker will move outward. If you have the polarity reversed the speaker will move inward.
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Old 07-24-2018, 10:13 PM   #3
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Even a AA battery will make the speaker crackle. Had to do that with my Sentra as dip shit couldn't connect anything in there right and used wire nuts.
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Old 07-25-2018, 06:35 PM   #4
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Quote:
Originally Posted by alabama_lowlife View Post
The FSM shows gray and gray/red for the right rear. It shows green and green/black for left rear. You can check the polarity with a 9v battery. If you connect it with the polarity correct, the speaker will move outward. If you have the polarity reversed the speaker will move inward.
Son of a bitch. I never knew that. I learned something new today.
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Old 07-26-2018, 03:16 PM   #5
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Originally Posted by cadillacdude1975 View Post
Son of a bitch. I never knew that. I learned something new today.

Me too !!
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Old 07-27-2018, 02:24 AM   #6
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Awesome, thanks for the info!
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