O2 Sensor - Only 2 Wires Connected?

[Brett Dikeman]

At 1:08 PM -0700 4/25/04, Adam A. Luy wrote:
>1987 5kCSTQ Avant
>
>Was checking my O2 sensor today and saw that only the two white wires are
>plugged into a connector. The black wire has a boot and male flat connector,
>but it isn't plugged into anything. The only other unused compatible female
>connector is located near the fuel filter toward the firewall. Anybody know
>if this is the way it is supposed to be

No, the two are supposed to be connected.

>I thought the whites were for
>heating, and the black was for signal?

Correct.  You've been running open-loop(no lambda control).

Brett
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