10
Mounting recommendations
•
Connecting wires
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Wires should be fastened to stable wires or other non-
moving parts. Any heat emitting and/or moving objects
should be kept away from the wires.
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There should be no exposed wires. If factory isolation was
removed while connecting the wires, the isolation material
should be applied.
▬
If the wires are placed in the exterior or in places where they
can be damaged or exposed to heat, humidity, dirt, etc.,
additional isolation should be applied and the wires should
not be loose.
▬
Wires cannot be connected to the board computers or
control units.
•
Connecting power source
▬
Be sure that after the car computer goes to sleep mode,
power might be still available on the power wires.
Depending on the car model, this may happen in 5 to 30
minutes period.
▬
When the module is connected, measure the 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. 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 FMB204
operation and even its failure.
