Quick Question..
Electrical theory can be a challenge for those who have not studied it....& sometimes for those that have!!!!!
If you hear a noise in the engine, oil leaking on the ground, smoke coming out of a breather, you can see, hear, feel the problem.
But electricity works in silent ways. Some 'imagination' is reqd to visualise what the electricity is doing....
You are nearly always looking at a result, the finish. The challenge is to start at the finish & work backwards to the start....