Well still no heat, last night tried removing and reinstalling the three prong plug along the firewall, and that did nothing, connections looked clean. Then upon closer inspection when looking at the fuse for the third time, did realize it had a hairline crack. Off to dealership this morning, replaced, still no heat.

Tonight I'll buy a voltmeter and test the voltage across the terminals of the plug, but fear I'll be going into where the blower motor is to replace the resistor. I've replaced a blower motor and resistor on a 91 BMW e30 in the dead of winter, but am hoping this one is a little easier to get at. Wish it would warm up here in Toronto to do this work.