EGO/HEGO wiring.

[Regnirps at aol.com]

xxalexx at ix.netcom.com writes:

>usually the heater wires same color white(or was that black)
>and sensor grey?
>I have not seen any other colors except solid  blk, white,. grey
>and  I'm not color blind.
>Wiring diagrams sometimes have the colors before there own connector
>changes colors.
>alex 

My NGK Ford three wire units are two white (heater) and one black.

The Four wire adds a gray wire. I assume it is the sensor return but have not 
tested it yet to make sure they didn't make the black the return.

Charlie