Bill,
I stopped by the JD dealer last Friday and looked at the seat switches on some of the bigger machines. Those units that allow you to pull up on the seat switch to keep the PTO running when stationary, use four wires. The seat switch on the 2210 is actually in the bottom of the seat cushion, and only uses 2 wires. This four wire switch is quite large and I don't see any easy way to adapt it to the 2210.
I think I will search for an aftermarket push/bull switch that can be wired in parallel with the OEM switch. You can jumper the OEM switch, but if you forget to remove the jumper before you put the seat down, this saftey feature would no longer function. A push/pull switch mounted to the seat frame and wired in parallel to the OEM switch, could be setup such that when the seat is lowered it would push this new switch down (open circuit) and the OEM seat switch would continue to work correctly. Flip the set forward, pull up on the new switch (closed circuit) and the PTO will run.
If you pull up my personal information on my call sign, you can view all of my post. Look for the one on auxilary lights. I explained what I had done and included several pictures of the lights and switches. I did run a separate supply directly from the battery, through a 40 amp fuse, through a relay tied to the ignition switch to an additional 6 circuit fuse block. The fuse block feeds the three switches I mounted on the dash. I'll try to figure out a nice way to sketch the two wire harnses I made and will post them.
The service manual was $40.17 and is the same manual that the guys at the JD show use. I had one on for my 445 and found it quite useful. The light wiring changes would have taken longer with out the wirng schematics from the 2210 shop manual. They have very detailed wiring schematics. It also includes detialed hydraulic diagrams and information on all segments of the tractor. I perform all my own maintence and repairs and like being as informed as the JD dealer. (They don't always like that!) /forums/images/graemlins/mad.gif
Later,
John /forums/images/graemlins/grin.gif