Garmin TREAD Owner's Manual page 160

2 Connect the negative or ground wire
distribution block, or directly to the negative terminal on the battery.
Do not connect the accessory ground wires to the ground terminal (GND) on the Garmin PowerSwitch
device. Failure to heed this notice could result in personal or property damage, or negatively impact device
functionality.
3 Verify that all electrical connections are tight and will not come loose during use.
154
to an unpainted ground stud
NOTICE
on the vehicle frame, to a ground
Appendix