In this video i have explained the Detailed Wiring , Connections and working of AC Blower and Related components along with measurements of Resistance, Volts and Ampere's. That could help to understand and diagnose related issues for any car. (here I have Corolla 2007)
Initially measured the Resistance of Blower Motor along with Speed control Resistor pins,
Measured Running Volts and Amperes at different speeds selected, wiring connections and diagram and at last the Heating temperature of Resistor controller,
and also described the connection of PWM based speed controller instead of resistance based speed control mechanism.
Chapters.
00:00 Intro
Measurements
0:10 Resistance
0:40 Running Volts
1:07 Running Ampere
Connections
1:44 Connection Diagram
2:10 Wire Connections
3:50 Resistor Placement
4:15 Resistor Temperature
4:24 PWM Speed Controller

Video Part II :
   • Car AC Blower Speed Control with PWM ...  

Links to the videos similar context is below
   • Car AC wiring diagram | How To Test C...  
   • blower motor or resistor ful prectica...