Only ever seen JD wiring diagrams in their tech manuals and they are great.
Down side is they are quite dear, but for a trade person would pay for themslves in the first use due to time saving.
Well worth the money but I just bought the L300 series one as a down load for $ 60.00.
You could try the real tractor forum http://www.tractorforum.com .
The members over there have stumped up with copies of several JD manuals that I have needed recently or have some good links to cheaper downloaded copies .
