Turn Blower motor on, radio turns off

i've searched cant find nothin'
This morning i got in my car, and my radio was off, so i felt the vents and i wasnt getting any air and my blower motor was on 3. I turned it off and my radio turned on.. Would it be the resistor pack that controls the speed's of the fan or maybe a fuse? Any help?
This morning i got in my car, and my radio was off, so i felt the vents and i wasnt getting any air and my blower motor was on 3. I turned it off and my radio turned on.. Would it be the resistor pack that controls the speed's of the fan or maybe a fuse? Any help?
Comments
Can you please tell me if the ground was part of the speakers or the fan wiring harness?