i would try unplugging the blower motor itself and put a DMM in place of the motor, so you can see if your getting voltage, and with the DMM in place, just see if your getting power there (most likely 12v at the high setting) and if it blows with the blower motor not connected its a short IMO, if it doesnt blow when the blower motor is disconnected, reconnect it and try, if it does then, its most likely the motor, at which point i would go buy another blower motor and plug the new one in and see if it does still pop
if ya do all that and it still blows, lemme know and ill look at teh schematic to see if it oculd be something else
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