2006 Ford Five Hundred Car Audio Wiring Diagram Whether your an expert Ford Five Hundred mobile electronics installer, Ford Five Hundred fanatic, or a novice Ford Five Hundred enthusiast with a 2006 Ford Five Hundred, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2006 Ford Five Hundred vehicles are becoming increasing more difficult to identify due to the installation of more advanced factory oem 2006 Ford Five Hundred | Stereo Wiring Diagram 2006 Ford Five Hundred Stereo Wiring Information. Radio Battery Constant 12v+ Wire: Violet. Radio Accessory Switched 12v+ Wire: Black/Pink. Radio Ground Wire: Black/Orange. Stereo Amp Trigger Wire: Gray/Black. Left Front Speaker Positive Wire (+): Orange/Light Green. Left Front Speaker Negative Wire (-): Light Blue/White.