These are instructions on how to install a GPS tracker to a vehicle using the CalAmp Harness. There are three wires to make the harness work are the Red (Constant Power Source), White (Ignition Source), Black (Ground). Below are the connections diagram for the multiple type of harness.
Securely attach the wiring harness to the CalAmp and find a constant 12 VDC power source. Connect the constant 12 VDC power source to the red wire on the tracking device. Next find the ignition wire on the vehicle and connect it to the ignition input in the fuse box. Finally, connect the ground wire on the harness to the vehicle ground (chassis).