First, a big thank you to the members of this forum, you solved why my '91 pickup quit and was blowing fuses. The O2 sensor wire harness had come in to contact with the exhaust pipe as you guys said, and that fixed the problem. But! But the plug-in connector that is in line also was against the exhaust pipe, and it melted it pretty bad. Although I got it running OK, I'm concerned about the durability of that plug connection, and need to find another, and there is not a Toyota dealer handy. Are they available from any on-line parts dealers that anyone would know of? I checked one source for parts I saw mentioned in some other posts here, but all they offer is the sensor itself, so I thought I would just ask.
Again, THANKS for your insight and knowledge here, I was 20 miles from home and you guys got me going again.