
the power wires. Depending on car, this may happen in 5 to 30 minutes period.
When module is connected, measure voltage again to make sure it did not decrease.
It is recommended to connect to the main power cable in the fuse box.
3 A, 125 V external fuse shall be used.
Connecting ignition wire
Be sure to check if it is a real ignition wire i. e. power does not disappear after starting
the engine.
Check if this is not an ACC wire (when key is in the first position, most of the vehicle
electronics are available).
Check if power is still available when you turn off any of vehicles devices.
Ignition is connected to the ignition relay output. As alternative, any other relay, which
has power output when ignition is on, may be chosen.
Connecting ground wire
Ground wire is connected to the vehicle frame or metal parts that are fixed to the frame.
If the wire is fixed with the bolt, the loop must be connected to the end of the wire.
For better contact scrub paint from the spot where loop is going to be connected.
PAY ATTENTION! Connecting the power supply must be carried out in a very low
impedance point of on-board vehicle network. These points in the car are the battery
terminals. Therefore, we recommend connecting the power of FMC920 (GND and
POWER wires) directly to the battery terminals. Another valid option is to connect the
wires to the main POWER cable inside the fuse box (if there is none, then to the power
supply where the fuses of vehicle’s computer are), GND wire must be connected in a
special point, designed to connect GND vehicle computer. Connecting the GND at an
arbitrary point to the mass of the car is unacceptable, as static and dynamic potentials
on the line GND will be unpredictable, which can lead to unstable FMC920 operation
and even its failure.
Installation photos
FMC920 is the device that has internal GNSS and GSM antenna.
Device should be mounted with the sticker view to the open sky (metal free). FMC920 area with
sticker is shown in figure below: