Blower motor wiring problem

There is something wrong with the blower motor, but I do not know how to fix it. When I try to turn on the heat or AC, no air comes out. If you connect the wiring from the car battery to the blower motor, it works, but it does not work with its own wires. I am not sure if they are not connected correctly or damaged, but about how much would it cost to get this fixed at a service center? And if I were to try to take care of this on my own, which information do I need to know in order to know what I am looking for and how to do so? Please help, winter is coming, and I cannot drive this car if the defroster does not work.