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3
Installation Steps, Continued
STEP ONE Chassis ground-Connects to the BLACK
wire of the Power Harness
A clean, bare-metal chassis ground point, battery
ground, or electrical grounding bus bar where the
resistance between the battery of the vehicle and this
point is less than 2 ohms.
STEP TWO Constant 12V+ (Battery)-Connects to the
RED wire of the Power Harness
A source of positive 12Vdc voltage that continuously
has power regardless of the status of the ignition
switch or any accessories. This source should
supply between 11 and 14.5 volts of power normally
and be capable of supplying at least 3A of current.
3-Wire Installation
Mobile Equipment Manager
(LMU 2630/ LMU 2720)
STEP THREE Switched 12V+ (Ignition/hour-meter)-
Connects to the WHITE wire of the Power Harness
A source of positive 12Vdc voltage that shows 0
volts when the engine is not running and battery
potential (usually 11-14.5 volts) when the engine IS
running.
Red - Battery
Black - Ground
White - Ignition
NOTE: The recommended point of connection for the
BLACK and WHITE wires in a Mobile Equipment Manager
installation would be directly at the factory hour-meter.
This will provide the most accurate monitoring of engine
runtime. Contact Pedigree Technologies if you have
questions about alternate connection points.
This is acceptable assuming that the (+) wire for the
hour-meter is the one that transitions from ON to OFF
with the engine. If your particular hour-meter has a
switching GROUND connection, this method is NOT
acceptable!
White Wire
(Switched 12v)
Black Wire
Ground
