Motorola VC5090 - Manual (Page 38)

2 - 10 VC5090 Vehicle Computer Product Reference Guide
12 Volt Propane Forklifts
• All power wiring must use the supplied power cable.
• Fuses:
• two 3AG, 20A, 250V, SLO BLO fuses
• one 3AG, 1A, 250V, SLO BLO fuse.
• Keep the path between the battery and the vehicle computer as short as possible, and away from any part of
the ignition high tension system.
Figure 2-11 Wiring Diagram
1. Disconnect the vehicle battery.
2. Connect the green wire to the vehicle’s negative power source.
3. Shorten cable to desired length.
4. Place a fuse and fuse holder in-line of the red, black and yellow wires approximately four inches from the cable
end, as shown below.
NOTE The vehicle computer contains an Ignition Sense feature that detects when the ignition switch is turned off
and shuts the vehicle computer down after a preprogrammed timeout. This feature allows the operator to use
the vehicle computer for a predetermined time period after the ignition switch is turned off, then shuts the
vehicle computer down automatically to prevent over-discharge of the forklift battery. The timeout period is
adjustable by the user (see
Ignition Sensing on page 3-22 for setting the timeout value). The normal current
draw of a suspended vehicle computer is approximately 500mA. When the vehicle computer shuts down
using the Ignition Sense feature, current draw is reduced to approximately 5 mA. This feature provides the
automatic shutoff functionality of an external relay, without requiring an actual relay and has the added benefit
of allowing the user to work for a preset time period before shutting down.
VC5090
20A Fuse
1A Fuse
Ignition Switch
20A Fuse
Vehicle
Battery
Power Cable
25-71919-01R
Yellow
Red
Green
Black
NOTE See the vehicle Owner's Manual for specific wiring information.