1994 Mercury Grand Marquis Stereo Wiring Information
Radio Battery Constant 12v+ Wire: Green/Yellow
Radio Accessory Switched 12v+ Wire: Yellow/Black
Radio Ground Wire: Black/Light Green
Radio Illumination Wire: Light Blue/Red
Stereo Antenna Trigger Wire: Orange/Blue
Stereo Amp Trigger Wire: Blue
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Left Rear Speaker Positive Wire (+): Green/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): White/Purple
1994 Mercury Grand Marquis Speaker Sizes
Audio Front Speakers Size: 5 1/4″ Speakers
Audio Rear Speakers Size: 6″ x 9″ Speakers
The following information is currently not available:
Stereo Dimmer Wire
*If you know any of the above or any other missing information please use the comment box below to notify us.