I've had a lot of courses on electricity in reference to automotives and wiring diagram fault tracing.....the important part of elec 101 to understand is voltage vs amperage..what are the diffs..how to test for power and grounds,how and when to use a multimeter, what is resistance and how does it affect elec circuits.....and how to perform voltage drop tests......and of course all the little things like what elec circuits consist of and how their contruction with various different components causes a circuit to react...like diaodes, transistors and capacitors if you can correctly answer most of these questions you are well on your way to understanding electricity in automotive circuitry....and these are just a few off the top of my head

 

Yeah I'm on my way to graduating from Nashville Auto Deisel College, just got out of the DT-108 advanced electricity course. This problem puzzled me, I had never heard of this problem with Mustangs before. Ya learn from experience I suppose!