Ford 2004 Expedition Owner's Manual page 351

equipment installed in your vehicle should comply with FCC or CRTC
regulations and should be installed only by a qualified service
technician.
• Mobile communications systems may harm the operation of your
vehicle, particularly if they are not properly designed for automotive
use.
2004 Expedition (exd)
Owners Guide (post-2002-fmt)
USA English (fus)
Accessories
351