GeoVision GV-Compact DVR V2 User Manual page 31

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Method 2: Connect the black ground wire to the vehicle's chassis so that the wire
contacts the bare metal, for example, a metal bolt nearby.
Figure 3-13
Depending on the make and model of your vehicle, sometimes only one method will work.
When the black ground wire is connected correctly, GV-Compact DVR V2 will
automatically shut down 30 seconds after the car's power is off. If GV-Compact DVR V2
does not shut down 30 seconds after the car ignition is off, try to connect the black ground
wire using the other method.
4. Turn on the car ignition and the GV-Compact DVR V2 should start automatically within 5
seconds. Turn off the car ignition and the GV-Compact DVR V2 should shut down 30
seconds after the car ignition is off.
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