1- Basic Air Conditioning Components
2- Liquid Vs. Gas Refrigerant in the System
3- High Vs. Low Pressure Sides
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Juniors Assignments
Electude
The links are help videos for the Electude assignments. Watch them.
Exhaust Gas After-Treatment - Basics
    Electude Help for Exhaust Gas After-Treatment including changing parts

      Air Temp Sensor and DVOM and Locating Sensors for Diesel Engines - Sensors

Common Rail Diesel - Basics 
      Common Rail Diesel (CRD) video with an an explanation of PSI vs. BAR Pressures

CAN - Bus - Basics
      A look at CAN-Bus video

NEW - Climate Control - Basics
     Climate Control - Heat 
     Climate Control - What's under the Dash