FORD 2011 F-550 v.2 - Manual (Page 414)

• To avoid interference with other vehicle functions, such as anti-lock
braking systems, amateur radio users who install radios and antennas
onto their vehicle should not locate the Amateur Radio Antennas in
the area of the driver’s side hood.
• Electrical or electronic accessories or components that are added to
the vehicle by the authorized dealer or the owner may adversely affect
battery performance and durability.
Accessories
414
2011 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)