Got the fateful smell of burning electronics in my cabin and sure enough, the fan started working erratically. Was reasonably certain it was the blower resistor and found a new OEM one for $50 on eBay. Car was going in for a few things that were out of my scope of capabilities (I'm riding out the apocalypse at my beach house in SC with just a few simple tools) so I asked them to diagnose the fan while it was in the shop. Confirmed resistor, P/N 64116923204, needed to be replaced which the dealer wanted $600 for. Declined the work and once the car was home pulled glove box and trim, installed new resistor but nothing, no fan action. Checked fuses, all good. System seems to work otherwise, A/C kicks in. Checked connector was on correctly and all the way in, all good. Anything else to check or reset? Maybe I got a bad resistor? Was a reputable seller and part looked new. As always, advise would be appreciated.

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2005 X5 3.0, Manual Transmission, Black on Black, Sport Suspension, 250,000+ miles and counting, Best SUV I've ever owned