AUTOMOTIVE TROUBLESHOOTING Classic WW2 Training Film 1942

...hmmm..back when a fella could trace out the malfunction. Now you could have 100 parts fail & don't know where to start. 7 computers, but the glove box won't spit out a tape of wtf is wrong. Take off a "bad" part & he looks exactly like the new... No tell-tale burnt places. Give me points & a carb, pls!