Users Manual Chapter 5

Thor VM3A Vehicle-Mounted Computer 85
Auto-On Control Wiring Diagram for 10-60 VDC Direct Connection
Auto-ON must be selected on the Power Mode control panel. The vehicle supply
connections should be made to vehicle switched power to allow the terminal to
automatically powerup when vehicle power is switched on or when the power
switch on the back of the dock is placed in the On position. The Ignition wire is not
used and should be left disconnected.
•V
IN+ (red wire) is connected to battery positive. If there is a red wire and a red/
white wire, twist them together and connect to battery positive.
•V
IN- (black wire) must be connected to battery negative. If there is a black wire
and a black/white wire, twist them together and connect to battery negative.
• GND (green wire) must be connected to the vehicle chassis ground.
•V
IN+ (red wire) is connected to battery positive. If there is a red wire and a red/
white wire, twist them together and connect to battery positive.
•V
IN- (black wire) must be connected to battery negative. If there is a black wire
and a black/white wire, twist them together and connect to battery negative.
• GND (green wire) is connected to the vehicle chassis ground, which can also be
battery negative.
Quick Mount
Smart Dock
Circular
Power
Connector
COM1 or COM2
Connector
Existing Circuitry On Vehicle
Battery
Main Switch
-Vo+Vo
Cable for optional
screen blanking
connection
See Caution statements
Fuse - See
Fuse Warning
(not connected)
Red
Black
Green
Blue
Red/White (if present)
Black/White (if present)
Caution: For battery powered vehicles:
Caution: For internal combustion engine powered vehicles:
Warning: For proper and safe installation, follow the Fuse Requirements for
10-60 VDC Direct Connection.