Can Any one tell me where the resister or what ever it is that controlls the blower moter speeds is located on a 2001 F150 Super Crew 4x4 5.4L Tired of hearing wife complain so I need to fix this asap Thanks

 

Look behind the glove box in the duct work.

 

i have not looked specifically on the 2001, but normally you lay on the passenger floor and look up under, behind the glove box as mentioned. look for a 4 wire plug. The resistor is a "set" on a plastic block screwed to the hot air duct. less than 2 inches square.