Hey, So in my 96 ZJ the heater wont work. For a bit it would work just NOT on high. Now it is out. I have tested all the fuses and relays I can see, they work. I have tested the blower, it's fine. I have replaced the resistor, and nothing yet. I tested the wires into the resistor and there was nothing. I checked the switch as well and there was no power there, just not sure if that is due to whatever is wrong or the cause? I have no idea what it is, I looked for a relay behind the glove box and around the blower motor and didn't see one anywhere.