CABLE INTERFACE
Main Harness Connections in Detail
RED and White (+) 12volt Input When Connected to Truck
Locate the Red wire and the White wire found on the cable connected to the GPS unit. The red wire AND
the white wire must be connected to a 12-volt source from the vehicle that will be connected to the trailer.
It's important that the 12 volt power source maintains 12 volts at all times the trailer is in motion.
BLACK (-) Chassis Ground Input
Locate the Black wire found on the cable connected to the GPS unit. The black wire must be connected to a
solid chassis ground uninhibited by paint or plastics. It is important that you do not use any floating
grounds from the vehicles electrical system. Always connect the ground directly to the chassis body and
secure with a factory bolt or aftermarket screw insuring wire to metal connection. It is also advised that you
connect a jumper to the pin in your trailer wiring socket that is the “Ground return to towing vehicle”
SAE J560 and J1067 Wiring Circuits
Note: Trailer trackers are shipped with NO charge on the internal battery. The trailer must be attached to a
truck for it to be powered; it takes 24-48 hours to ompletely charge the internal battery.
Note: It is imperative that the units wiring is connected to pins that will be powered by ALL trucks in your
fleet. Use a multimeter to check the connection coming from your trucks to verify how your trucks are
wired. If a large percentage of your trucks do not provide power to the auxiliary power pin you may
consider wiring the units to the marker lights. (Under this scenario the device will ONLY receive external
power when the lights are on. If you use this method we strongly recommend you have your drivers always
drive with their lights on.)
WARNING: IT IS IMPORTANT THAT ALL WIRING CONNECTIONS ARE SECURE AND WATERTIGHT FOR
RELIABLE OPERATION OF THE UNIT.
Terminal
Color
Lamp and Signal Circuits
1
White
Ground return to towing vehicle
2
Black
Clearance, side marker,
3
Yellow Left turn signal and hazard lamps
4
Red
Stop lamps and antilock devices
5
Green
Right turn signal
6
Brown
Tail and license plate lamps
7
Blue
Auxiliary
