Speed, I emailed you a couple of scanned images from the Chilton's manual #66500.
You can check the O2 sensor heater with an ohmmeter. A good reading is about 10-15 ohms and it gets its power from the ECU. Do NOT check the O2 sensor itself with an ohmmeter. Check the sensor with the meter on DC voltage. The sensor puts out a voltage in the range of 0 VDC (very lean) to about 1 VDC (very rich). When cruising, the signal will tend to bounce around 450-600 millivolts.
If the oxygen sensor is bad, it won't set a CEL until the engine has been running about 15-20 minutes with a significantly bad sensor input. The sensor can be bad but the ECU will still think it's good. That's why it's a good idea to see what the sensor is doing by checking its actual output with a meter.
Don, y'all
.