Where Is All The Tech Help

Not everyone can read / understand the wiring diagrams.
They didn't have many color wires with various tracers like used today. "Blue wire to fuel sender" and a crowd of blue wires in other places too.
I've dealt with many guys who assume a black wire is a ground wire. It is a ground wire in the sense that it is the ground side of a circuit . That's not the same as a chassis ground though.
Terms like "revolver plug" muddy the waters too.