Last night the HVAC died. No LEDs, no relay clicking, no blower activity. Not even on defrost mode. One moment it was on, next moment off. Almost as if the fuse blew. The #16 & #17 fuse is good along with the mini 5 amp one near the glovebox. I have 12 volts at the gr/br wire at the blower. Microswitch tested ok via an ohm meter. I'm at a loss. Any suggestions?