Hi all, tonight I noticed, for the first time, when trying to defog my windshield, that it, at first it didn't sound like it was on. About a minute or so later, it finally kicked on, then off again. It continued to do this until I pulled into my garage. Checked fuses, nothing. Turned the grand cherokee off and off, nothing. The only thing I can think of, might be blower resistor?? Any guess or sure things are welcome.