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These are the wire and coloras for that car lft is componet rt is wire color 1989-90 Nissan 240 SX Stereo Information Constant 12V+ Red/Black Switched 12V+ Blue Ground Chassis Illumination Red/Blue Dimmer Red/Yellow Antenna Trigger Black/Red Antenna Left Rear Front Speakers 4" x 6" Doors Left Front (+) Blue/White Left Front (-) Blue/Yellow Right Front (+) Brown Right Front (-) Brown/White Rear Speakers 6 1/2" Rear Deck Left Rear (+) Red Left Rear (-) Green Right Rear (+) Blue Right Rear (-) Pink

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Q: How do you hookup an aftermarket stereo in a 1990 240SX when it's already had one in it but you don't know what wires you need to connect to your stereo?
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