i have no air blowing when i turn on ac/heat switch i replaced blower motor and resistor all fuses and relays are working could it be bad switch i have no other clue

 

Yes, it could be a bad switch. All new Jeeps use electric switches now, which makes them much easier to diagnose. Try Ebay for a used one before buying new.

Alternatively, make sure the blower motor plug is connected snugly, because my XJ's blower motor plug had a melted connection that liked to go in/out all the time.