I don't think there is a specific ground wire going to the frame, which is what the bed is bolted to, so you may not have a very good ground for your antenna.

Make sure you have excellent grounds and install a filter capacitor at the fan and CB and I'd bet your problem will go away. A CB shop can probably help you out.


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik