So I have a 2007 Megacab with the dual climate control. I started having issues with the blower motor not turning on, I would tap the box under the glove box and it would work. Well that stopped working. So I searched around and read that it could be the blower motor resistor. I went to autozone and they wanted to know if the truck had rear a/c. I said no it just has vents, so they gave me the non rear a/c resistor($65). It is totally different then what I have, so I took it back. The rear a/c resistor is a special order product and itis $155. So before I start throwing money at it is there a way to test the blower motor resistor? Should I be checking the a/c controller? Any help is appreciated. It sucks not having a/c and living in Las Vegas.

 

Can't answer your question about the resistor, but if you tap the motor and it comes back on, it's the blower motor, not the resistor. I had the same exact issue on my wife's Megacab. Thought it was the resistor, replaced it and still had the problem. I then noticed that if I tapped the blower motor when it quit, it would start working again. So I replaced the blower motor and all is well.

 

I have replaced the blower motor on my 05. It had the exact same issues.

 

Came across this problem with my 05 the other day. Just wentt out and gave the motor a wack with a little rubber mallet and it started blowing again. I'll leave the mallet in there so my wife can play wack a motor if it quits again.