Wire colors

[jguzman75]

I am going to add an amp to my X and I found the wires that feed the speaker but I do not know which one is + or -. I have searched the net and here but have come up empty. Does anyone know which one could be the positive?

 

[2kflhr]

I was told once by an installer that you can take a 9 volt radio battery and put it on the two speaker terminals and if the cone moves outward the positive battery post is on the positive speaker terminal. If the cone retracts the positive battery post is on the speakers negative terminal.

I've never tried it but so can't say for sure it works.

Also I found this:

2000 Ford Expedition Car Radio Wiring Diagram

Car Radio Battery Constant 12v+ Wire: White/Purple
Car Radio Accessory Switched 12v+ Wire: Black/Pink
Car Radio Ground Wire: Black/Green
Car Radio Illumination Wire: Blue/Black
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: Blue
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 6″ x 8″
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): White/Red
Left Front Speaker Negative Wire (-): Brown
Right Front Speaker Positive Wire (+): Green
Right Front Speaker Negative Wire (-): White/Orange
Car Audio Rear Speakers Size: 6″ x 8″
Car Audio Rear Speakers Location: Rear Doors
Left Rear Speaker Positive Wire (+): Light Blue/Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Purple/White
Right Rear Speaker Negative Wire (-): Light Blue

Heres the link: 2000 Ford Expedition Car Radio Wiring Diagram