Great job, Roger!
I'm going to read your posts over more carefully when I get a chance.
Originally Posted by roger 04 rt
Still to be done:
--Figure out what to do about Motronic heater wires (cut or add a resistor)
You might try powering the heater in the LC-1 sensor from the ECU, you know, just like the narrow band heater. The ECU O2 sensor heater output is always on when the motor is running, and I don't recall but the heater may also be on whenever the ignition key is on.
The LC-1 may have a PWM heater control. If so, use the ECU O2 heater output as the high current input to the LC-1 heater supply. Note: 'High current' is a relative term here. An O2 sensor heater only uses about 16-18W or 1.25-1.50A