Appendix A Installation, Configuration and Calibration of GPS Dead Reckoning 49
Vehicle wire connections
The GPS Dead Reckoning navigation system connects to the vehicle's reverse signal wires
(or reverse light) and the speed signals. This connection signals the navigation system when
the vehicle is traveling forward or in reverse See “GPS Dead Reckoning - Vehicle wire
connections” on page 49..
Reverse
Light Bulb
Reverse Light Signal
N.C Type Relay
5VDC
FWR+
FWR-
N.C
N.O
SPEED+
SPEED-
Figure 35
GPS Dead Reckoning - Vehicle wire connections
To Vehicle
Odometer
When no negative terminal
on odometer, connect
SPEED- to vehicle Ground
Pin 1
Pin 2
Pin 3
Pin 4