9
GPS and Satellite Antenna
Determining the Mounting Location
The GPS and Satellite antennas can generally be mounted close to each other and the cables
run together into the cab. Both antennas are magnetic mount. Because of this method of
mounting and the requirement of having ferrous metal underneath each antenna for reception,
the best location is for them to be placed on a ferrous metal surface. The top of the cab is an
ideal location as it gives an unobstructed view of the sky for good reception of signals. If the cab
is non-metallic or non-ferrous, then a steel backing plate will need to be placed under the
antennas to enable them to receive signals. If a steel backing plate is used, it should be a
minimum of 3” x 3” square for
each
antenna. If both antennas are to be placed on the same plate,
the minimum would be 6” x 6”. Affix the plate to the top of the truck and place the antennas on it.
The plate may be bare, coated or painted.
If the top of the cab is unsuitable for mounting, some other locations to consider are:
On an angle bracket bolted to the back of the cab or wind diverter
On an angle bracket on top of a side view mirror
Inside the cab in the headliner (if the roof is non-metallic)
The area in front of the windshield next to the hood opening if there is enough room
Antenna cable routing
The cables may be run through an existing hole in the top of the cab if one is available. Cab
mounted running lights often provide a convenient place to gain access to the interior of the cab.
slight modification of a light may be necessary to allow the cables access. Once inside, run the
cable in the headliner or trim over to a side post and then down.
GPS Antenna Mounting Example
If there is no immediate access from the top of the cab, a small hole should be made. Be sure to
use a rubber grommet for protection of the cable from sharp edges. Use silicon caulk to seal the
hole against water intrusion.
