air/feul ratio

[Jonboy_VTR]

im fitting an air to feul ratio gauge in my mk2 vtr and theres a grey wire that connects to the wire that sends the signal from the sensor to the control unit....anyone know which one said wire is, and where i should look for it??

cheers

[mallboy]

you connect the grey wire to one of the black wires on the lambda sensor on your exhaust system or cat depending on the model of your car!!