I have a 96' Pontiac Grand Am SE 3100 V-6 and the heat isn't working, and I can't figure out why. I checked the fan it works the fuses are fine. The window defrosters don't work either (like the wires that go across the back of the window). I assume my Heater Core is fine because it hasn't leaked coolant inside the car so I have no idea what's up maybe someone can shed some light on my situation that I can't see.