MTM 900M Series Installation Manual

900M SERIES INSTALLATION GUIDE
900M SERIES
Installation Guide
HOW TO HARD WIRE YOUR GPS TRACKING UNIT
Your GPS tracking device comes with a wiring harness. All electronics and antennas are internal to the device. Tools
you may use to perform the installation include: Screwdrivers, Wire strippers and cutters, Crimping tool, Voltmeter.
Additional materials you might use: Connectors, Tape, Zip Ties
For basic operation, connections are required to constant Power (+12V) and to Ground (sometimes called negative).
It is very important to ensure that your installation will last through the use of the vehicle. The environment inside a
vehicle is harsh due to vibration, temperature extremes, corrosion, humidity, and unexpected events. The primary
cause of failure for vehicle tracking devices is the unexpected disconnection of the power or ground wires.

1. Connecting Constant +12V Power

First, use the multi-meter to find a source of CONSTANT +12V near the dashboard of the car. There are multiple places
where this can be found, and the locations vary between vehicles. Some locations are more discreet than others, so
plan your installation according to your needs. You may find specific wiring details for your vehicle on the internet to
assist in locating the wires you need. For example, http://www.the12volt.com/ is one such source.
Ensure that the wire you choose is a CONSTANT source of +12V. The multi-meter should show approximately 12V
between your source and chassis ground regardless of the Ignition Switch position, and whether doors are open or
Using your preferred connector type, or solder, connect the
not to permanently disconnect the 12V source to other circuits in the vehicle and take care to make a strong connection
to survive vibration and temperatures.

2. Connecting Ground

BLACK
The wire must be connected to a source of chassis ground. This can be either another grounded wire, or a
clean metal connection to the chassis of the vehicle. Be sure not to permanently interrupt the ground connection to
any other circuit in the vehicle and that you have a strong and clean connection.

3. Occasional Connecting Required

GREEN Wire
The green wire is used connecting the device to the relay (ref. diagram below). For special applications, the white wire
can be used for ignition sense.
WHITE Wire
The white wire should be used on vehicles where there isn't a constant voltage (which provides virtual ignition). In this
instance, when the white wire is used, it should be connected to a 12v source that is on when the vehicle is turned on,
configuration can be send to the device.
(RED Wire)
(BLACK Wire)
(GREEN and
RED
wire from the tracker to the source of +12V. Be sure
WHITE wire)