how to read Automotive wiring diagrams the most simplified explanation part 2.this video explains how to read fuses switches and wiring to analyze circuits.it also explains the voltage measurements at each point and the color codes of the wires. in addition it also explains how a control module works and also how the lighting system works for low beam and high beam circuits. the voltage measurements of 12 volts is printed at the correct circuit points to make it easy to understand for the viewer. see my channel Joe electronic schematics for Auto and my other channel on Automotive electronic schematics by Joseph. after this video you already to analyze and troubleshoot schematics. I believe first you have to analyze the symbols and components and understand how they work and then you can understand their functions to troubleshoot them.