Homemade A/F Meter

[am018]

Sounds like a heater but check the wiring diagram for the donor car
A

Khoo Teck-Khoon wrote:

> The meter I am using is a digital voltmeter and the 2nd wire IS NOT an
> earth wire because there is no signal if connected to it. I have deduced
> that the earth seems to be base of the O2 sensor. Please help.
>
> Regards
> tkkhoo at hotmail.com
>
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