Users Manual Chapter 5

106 Thor VM3A Vehicle-Mounted Computer
• GND must be connected to the vehicle chassis ground.
•V
IN+ is connected to battery positive.
•V
IN- is connected to battery negative.
• GND is connected to the vehicle chassis ground, which can also be battery
negative.
DC/DC Power Supply with Screws on Side of Lid
Caution: For internal combustion engine powered vehicles:
Caution: Inspect the cable shield to verify it is connected to chassis ground. If
there is no connection from the cable shield to chassis ground, one
must be added at this time. Use a jumper wire to connect the cable
shield to chassis ground as shown below for the appropriate type of
power supply installed on the vehicle. A jumper wire, as shown in the
illustrations below, may be present to attach the chassis ground to
the white wire of the power cable. This wire is not necessary but can
be left in place if present. For proper screen blanking, verify the
yellow and green wires are attached to the screen blanking box as
shown in the illustrations below.