Hello this is my first post I did a search for this topic and didn't find a match so forgive me if I missed one somewhere.
I have a JD4410 Just picked it up from the shop today PTO wasnt working Soleniod plug pulled apart by brush seems to be a common problem. Anyway they redid the plug and PTO working however tractor stuck in 4wd now even with switch off. It appears they did a substandard job with plug which annoys me considering the charge and that I could have fixed myself with $6 dollars worth of weather proof but splices! But I wanted it fixed right??

I'll get to my point it appears the wires for the 4wd soleniod aren't seated in the plug all the way PTO wires however are. I believe when the PTO switch is on it sends power to the soleniod. My question is how does the 4wd switch work? Best I can tell with a VOM when 4wd switch is off it sends power to the soleniod when turned on it kills power to engage 4wd? Obvioulsy I am calling the service department back in morning to inform them of issue and have them correct the substandard work. but I am curious how the switch and soleniod work? Any info would be appreciated.