Where can you find wiring diagrams for a 2014 Nissan Maxima?

It depends on which diagrams, stereo, engine, etc. Most service manuals (Haynes, chiltons) have some wiring diagrams. You can also go to a Nissan forums and ask for a diagram of what your looking for. Nissan sells wiring diagram manuals for older cars, but haven't seen one yet for a car that new.