pleasee help with air/fuel meter
 

hey guys , i am mounting a new autometer air/fuel ratio but i dont know what cable of the o2 sensor i have to use, please help me... because in the autometer page said something of 3 cables but the fit have 4, helpppppppppppppp lol

thanks juan

there are 4 cables, red, blue, green, and black. the red and the black i dont think so because the red is the positive an the black is ground, i think maybe is the green, only i want to know who of this cables is the signal wire of the o2 sensor... thanks

Jazz has 4 because has a resist heater inside the sensor. The “new” cable is the red which means +12 VDC.
Before two years I put the same device in my car, but….. I told you 2 years so now I do not remember. I think is the white but I am not sure. The only way to do damage to the gauge is to connect with red.
So one cable is the voltage (1vdc) that CPU sends to the sensor, other is the ground and final that you need is the return of the first (0-1vdc) voltage.
So take a pin or needle (is that way that I did) connect to gauge cable and touch one - one the cables of the sensor. To do this must the engine to be warm because if it cold the sensor do not work. So you must be careful about the exhaust.
I put the cricket of the car and I put 2 bricks under of the frond weels. So I did the job. ;)