B21 wiring diagram to troubleshoot starting issue

[gdial]

Hi all,
I have a 2006 B21 and trying to find a wiring diagram. Looked on several sites and found close but not exactly right. Tried the service shop at Shreveport Tractor where it was bought, he did not even have one.

My issue has been going on for awhile but now she is almost completely dead in the water. Sometimes it just won't start. Doesn't matter if you have been on it all day or just a few minutes. Sometimes even quits during use. You can't here the 'click' of the fuel stop solenoid, and if you hear that, it does star. But is very intermittent if that will happen. I have bench tested the solenoid and can't find a problem. I have taken the key switch out and inspected/cleaned. I have tried bypassing safety switches (seat, clutch and PTO), there are probably more but without a diagram.... It's now doing something a little different. If you turn the key on (not even getting into the seat) and walk away, I will hear the 'click of the solenoid while I'm doing something else after 15 min! I can then walk up to the tractor and it will start.
What could cause that?

Thanks for the help.

 

[85Hokie]

After reading your post.......could there be a bad ground somewhere in the mix? A bad ground will make you invent new words, finding that bad ground sometimes - takes time.
Is there anyway to supply power & ground to the solenoid while on the tractor, a bench test is fine, but on the tractor, it changes the situation completely - 'specially if a ground is at fault.

 

[100 td]

Quite possibly the neutral/HST switch, mine plays up a lot, I need to pull it/repair it. Diagram courtesy of Dave_eng

 

[gdial]

Thank you for the wiring diagram!

I will try again tomorrow to get it going and will definitely take a look at the PTO and HST switches and let you know.