Hello Ky_dodge_gir.. In most communities, the wiring to that outside unit is fed with flex tubing that comes from a disconnect box mounted to the outside wall of the house. If yours is like that, open it up and pull the disconnect module out to disable power to the fan motor. Before working on it, verify power has been disabled ( I use an inexpensive volt meter or non contacting inductive power sense testor ..looks like a small flashlight and beeps/lights up if power is sensed in a wire lead). Once you are certain power have been disabled, you should be able to unplug the existing fan power connector from it's corresponding mating plug or (assuming you have the exact replacement fan) match color code wire for wire from the old to the new. The fan unit is a bolt in/bolt out assembly so that should be fairly obvious when working on it. Hope that helps you..