If you're looking for the firmware to flash the 93C46 EEPROM within your CCSM, I have the firmware linked in this thread. I dumped it from a CCSM out of an '05 Aviator, but it works on both the 2L1T and 3L1T part numbers.
https://www.expeditionforum.com/threads/heating-cooling-seats-info.17480/
I had the same thing happen in my '04 Navigator. Water got into the mirror control switch and shorted it out. The SET/1/2 switch could also cause this. Disconnect the mirror and memory switches and see if the short is present.
Do NOT put a bigger fuse into the slot, or else you will blow a...
Apologies for the grave-digging, but I do have some information that will be helpful for anyone with an '03-'04 Expedition/Navigator with inoperative climate controlled seats and a B2477 DTC.
For some unknown reason, the CCSMs tend to lose their programming at random - searches online point to...
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