sounds like your blower motor resistor was burnt when you got the jeep. could have been from water leaking into your airbox from the fressh air intake or another source. it sound like the water might have now gotten to your blower motor as well. pull your blower motor and resistor and see if there is any signs of water on them. check for blown fuse. make sure your a/c box drain is not plugged. water test the cowl and other areas on that side to see where water might be getting in. hopes some of this helps