L90jkm

The heaters, air con and rear screen de mister on my 2005 impreza gx are not working, the car was damaged on the passengers side when I got it and I am sure there was a yellow wire running down the N/S wing that was snapped and was wondering if this could maybe be the problem? Looks like it is connected to the bottom of the fan but is hard to see and the fan is running ok. I have checked all the fuses and they are alright not sure what else it could be. Thanks in advance