Wiring nightmare! Help

The reason I ask about smelling hot plastic is cuz there are at least two known places in the interior wiring where heat likes to build up, due to high-resistance connections. #1 is the bulkhead connector, and #2 is at the headlight switch. Both of these places are high-current draws, and when they get hot, they get real hot; hot enough to melt their plastic carriers. So no stink is a very good sign.