Have checked all fuses and swapped the relays under hood. Also checked for any codes. Is it possible that the blower relay also controls the blower for heat, air cond and the rear window wire defrost? I started the truck yesterday and turned on to defrost and nothing. Like there is no power at all to the dash controls for these things. All fuses are good even at the dashboard. I hadn't driven the truck in a week but I seem to remember a smell of burning but it was short and gone. If it's the relay that fried, would this also eliminate power to the rear window defrost? Thanks in advance for any help. Joe.