Thanks to those of you who pioneered the solution for the Nav delete. I was able to get this done on my 02 LC in several hours and bypassed the Rear Heat vs. Rear AC-only issue. Based on a reference to the thread on repairing / replacing the buttons as they stop working, I realized the main circuit board is the same for all of the non-Nav units. You just have to make sure you put the blank plate over the second button and the "Rear" over the third button. I bought rotary controls from a salvage yard that had the rear heat, but my original Nav controls had rear AC only. You can pry off the buttons without opening up the unit to access the circuit board.
Everything works perfectly with zero troubleshooting. As stated many times on this thread . . . label everything, triple check your labels, cut and solder one at a time. There was only one wire in the entire process that did not perfectly match the other wire it was being soldered with (and it was close to a match white/blue vs. white/gray).
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