Blower not getting power

Ok, so i'm new to working on my car. Recently my air conditioning went out. I checked the relays and they were fine so I went to the shop to have it looked at. They said it needed a new resistor and blower motor and was going to be 400 dollars. Well I had already looked up the prices and wasn't going to pay that much. So anyway I hooked up the blower motor to a battery and it worked fine. Replaced the resistor and nothing. The compressor is kicking on and the fan won't start on any of the levels, not even on High. I'm thinking it's the switch, but not sure how to get to it.