Air Fuel Ratio Gauge 12V Racing Air Fuel Pressure fit for Car Truck 52MM GaugeAir Fuel Meter Indicator with O2 Oxygen Sensor

Feature:

1.When powered on digital gauge will read the voltage for 1 minute and switch to Air Fuel Ratio.It will only switch back to voltage if there is a decrease or increase. 2.It is suitable for 12 volt gasoline vehicles.

Connection:

Connection : The white line is at heater ab Black line signal line C, gray line signal ground D The green wire of the instrument is connected with the black wire of the sensor. The gray line is connected to the negative pole of the battery. One white wire connect with the car shell or battery negative pole. Another white wire connect to the ACC line of ignition switch The white line is the heater and does not distinguish between positive and negative electrodes About the air fuel gauge, please see the installation instructions.

Package:

1* Air Fuel AFR Gauge 1* English Manual(Only teach how to install the gauge,but do not teach how to install the O2 sensor,thanks)