Discrete Wireless MARCUS 3G GPRS Kurulum Kılavuzu - Sayfa 9
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4. Vehicle Wiring
4.1 To connect power-
It is helpful to review the owner's manual of each vehicle to determine which wires are
acceptable to use. Test probable wires with a digital voltmeter to determine if they have the
proper voltage in both the engine running, and engine off states. It is recommended that a 14-
18 gauge wire crimp be used to splice onto the proper wire. Acceptable methods of power wire
installation include poke and wrap, T-taps and scotch locks.
A constant power source is essential in the retention of GPS data inside the MARCUS
unit, and is REQUIRED. Be sure to verify that the power source you have chosen will work
when the vehicle is not running, and the keys are removed. Insert a 3-amp fuse in-line with
the power and ignition lead.
voiding the warranty. There are 2 in-line fuses included in the installation kit.
An Ignition source is also required for proper operation of the MARCUS unit. This wire
can be found in close proximity to the main power wire. Be sure that the wire that is tapped
is an ignition wire and not an accessory wire. Some vehicles have wires that are only
powered when vehicle is running, this is the preferred wire.
If there are any questions on what wire colors to use, you can contact the Field Operations
Director or Supervisor
The best place to pull power is at the ignition harness leading
to the ignition switch.
Make sure the ground point is WELDED not bolted to the under dash supports.
This will protect the unit against power surges and
4.2 To use wire crimp
Find constant 12+v wire and slide crimp
over wire. Slide red fused wire from Marcus
power cable all the way into the holder and
crimp with pliers. Cable tie the fused wire to
the lead wire. Next, find an ignition wire
that is 12+v when ignition is in the RUN
position and open or ground when ignition is
off. Slide crimp onto lead wire and then
insert fused ignition lead into side of crimp
and crimp with pliers. Cable tie the fused
wire to the lead wire. Apply Torque Seal to
all connections.
4.2.1 Picture - Proper use of in-line
power crimp
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