I need help working with the factory diagrams, specifically, what the different shades of color mean. Some wires are shown as a solid line, some as a thicker diagonally striped line, some just outlined. The first page of the section shows some things but not this. Any source for learning this stuff?
Also, the car I'm working on (84 944) has burnt up the wiring to the headlight switch, then the ignition switch, and now again the headlight switch. The headlights have not been upgraded to draw more power.