Question about Ford F
Red is switched 12 volts (+) off the ignition switch or other switched source.
Yellow is for the Tach's internal light, it should be hooked to the Headlight Switch dash light dimmer control.
Blue and the Black are both grounds (-), you can twist those together and ground them to the same point.
Green goes to the Negative (-) side of the ignition coil.
Posted on Jan 04, 2011
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Posted on Jan 02, 2017
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1995 Ford F150 Truck Car Radio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Red or Black
Car Radio Illumination Wire: Blue/Red
Left Front Speaker Positive Wire (+): Orange/Green
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): White/Green
Right Front Speaker Negative Wire (-): Black/White
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Oran
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