FC 45

[Bruce Plecan]

On the 4 wires, there is only one that I've found that is actually a 4 wire,
where all 4 wires are wired properly.  I tried several examples of several
numbers, and most had the heated grounded to the the shell.
Bruce



> > For the three wire unit, is the O2 sensor element and the heater element
> > both grounded to the shell?  Is one of the heater wires (two white wires
> > for the sensors I've seen) just a no-connect inside the O2 case?
> OOps...
> My bad.
> The 4 wire units are the bad ones... on the 3 wire, the O2 sensor return
is
> the case... the heaters are isolated on both.