I agree, the diagrams leave much to be desired, but it's still better than nothing! I have taken quite a number of cars/harnesses off and can honestly say the the diagrams do match the cars. But you have to use them with a grain of salt. If the diagram says grounded, then there should be a black wire somewhere close by attaching to the body.
Your suggestion sounds like a good money maker! If someone had some CAD software and created a better diagram with some pics on a CD, I think that a lot of people would buy it. Kevin
69' SS-350 ragtop, M20, 3.55 posi. Totally Disassembled & in boxes (I'm working on it!)
69'(Hugger Orange -originally, Burgundy now) Z-21 ragtop 327/PG, Driver