The Wilson Floating Ground Kit
Solving Those "No Ground" Problems
Wilson has the answer.
The idea is to avoid the vehicle ground completely and create a new and different ground. This is accomplished by using a separate wire insulated from the vehicle ground, effectively making a dipole for the antenna system.
The complete kit, including all parts necessary to convert your antenna system over to this method , with a 20,000 volt ( 5,000 volt working ) test cable, is available from Wilson Antenna.
Shown below is how to install the "No-Ground-Kit" on both the Trucker and Fiberglass antenna. It will work with all models of both types of antennas.