I have a 2001 Sport 4.0 5 speed. I was having a problem with my heater and AC, the problem was I replaced the blower motor and after that I had a blower but the air would not come out the vents, even though i knew it was working because I could feel the warm air slowly coming out of the vents when I was driving. Anyway Im going to sound stupid but this may save someone else alot of headachs. As it turns out the plug on the blower motor can be hooked up either way. After I turned the plug around it works properly with an abundant air flow. Please learn from my mistake.