I know that there is the signal wire or whatever it is called that the computer reads. There is also a power and ground for the heated part. What does the other do? Also which are which. I have one from an LT1 that I am not currently using and have long tube headers on my 350 and would like to wire it up to work, but all of the people I have seen do this only had 3 wire heated sensors. Also if anyone happens to have a trashed harness or something that they could sell me the connector to plug into this that would be great.

Thanks

Ben

 

The wiring diagrams for the PCM show the two data connections as "high level" and "low level". I'm willing to bet the extra wire is simply the "ground" for the signal, that would normally be provided by the exhaust system. That way they have a more accurate system, without relying on the ground passing through the bolts rather than through the donut gasket in the dual cat cars.

Just a guess though. Maybe tomorrow I'll go hook up a voltmeter and torch an old sensor, just to see if the output signal is the same reading from the signal wire to the "ground" wire, as it is reading from the signal wire to the body of the sensor.

 

two are hot, one is signal, one is ground. signal wires are white i believe.

 

By hot do you mean I need to hook voltage up to 2 of them?

Ben