not yet, but I will next chance I get and will test the wire again. Will the O2 sensors voltage still fluctuate rapidly if the heater doesn't get the proper voltage? Because I remember testing the new 02 sensor when I replaced it and it fluctuated how it was supposed to.
That would seem a bit odd, but when the heater is working, the O2 goes switching in under a minute. How long had it run before you tested it that time?