Template:FMB2 Possible mounting zones

Mounting recommendations

1. Connecting wires

• It is strongly recommended to mount FMB2YX outside of the vehicle with the sticker direction to the sky

Accessory and its description	Accessory connection schematic
Fuel tank sensors	Fuel sensor connection to FMB20X
A fuel tank level sensor which indicates the approximate fuel level on the driver's indicator panel exists in most cars. If the sensor returns analogue signal proportional to fuel level it can be connected to FMB20X Analog input. After connection to the tank fuel level sensor a calibration is needed because most fuel tank sensors are not linear. Calibration is performed by measuring voltage values resulting from the volume of fuel in tank.

2. 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.

3. 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.

4. 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.