I’ve never had anyone actually sit down with me and teach me to read schematics. I’ve read his book and watched countless YouTube videos trying to learn it. I still struggle but I muddle through it.
I learned auto electric, electrician electric, and electronics as a pre-teenager and spent a lot of time in radio communications.
Even so, working with equipment, there are at least half a dozen different types of schematics I am faced with. Americans, Japanese, English and Europeans all have their own way of doing things.
There are schematics, which help troubleshoot power and signal flow, and then there are wiring diagrams, which show how the harnesses are connected.
The best are ones where they don't even bother showing the wires at all, but just show the various modules and components as boxes, with short wires coming out of them, and then it's up to you to stare at the page until you fine where the other end of said wire magically appears again.
I have lugged scopes onto various jobs, but seldom has it told me anything of value. CANBUS can generally be t/s by a DC voltmeter, but like all things you have to learn how it behaves normally before you can know for sure the difference between normal and broken.
