My first question is this; did everything work fine before you installed the new fan? (I'm assuming there used to be either a light fixture or another fan there, correct me if that is wrong)
If so, did you also install a new switch at the same time?
The odd thing is that you only have 2 cables in your fan switch box. If power is coming in from the bottom of the box out to the fan at the top of it, then that switch shouldn't affect your porch light at all. This makes me think that someone junctioned off your fan cable up in the ceiling to feed your porch light and receptacles. If that is the case, and obviously, I can't say for sure that it is, then you will need to find someplace else to feed the porch light circuit.
If so, did you also install a new switch at the same time?
The odd thing is that you only have 2 cables in your fan switch box. If power is coming in from the bottom of the box out to the fan at the top of it, then that switch shouldn't affect your porch light at all. This makes me think that someone junctioned off your fan cable up in the ceiling to feed your porch light and receptacles. If that is the case, and obviously, I can't say for sure that it is, then you will need to find someplace else to feed the porch light circuit.
