I have aproblem with my 2000 tj heater.I have no blower at all.It does not work on any speed. If you remove the blower and conect it straight to 12v it runs have changed the resistor. I have 12v at the plug to the motor also. Do not know where tolook next.
I had the same problem last week, we first replaced the resistor but it was the switch part here is the video we used it was pretty simple and now it works like a champ ordered the part of of Amazon under $30.00 and like 5 min once you pull the dash appart... Jeep 2001 fixing the heater blower switch - YouTube