I need a wiring diagram for the air conditioner system on a 4440 john deere tractor. i am having trouble locating the source of power for the air conditioner compressor.

SOURCE: john deere 420 trouble starting getting gas and

The engine needs air, so be sure the air filter is clean. If it is not, replace it.

The engine needs spark. Replace the spark plug and be sure that the battery has a complete charge.

The engine needs good fuel so be sure the gas is newly purchased, not gas that has been sitting around for months.

SOURCE: ELECTRICAL PROBLEM

Can't get you a diagram but i can tell you most electical problems on these tractors can be solved by replaceing the key switch/modual or cleaning corrosion from fuse holders.

SOURCE: i need a wiring diagram for a john deere 4500

What are you trying to repair?What on the tractor is not working?Copy right laws prevent me from posting the diagrams but i can help you with your problem,i have access to the diagrams you need so let me know what you need.

SOURCE: how to rebuild hydraulic pump on 4440 john deere

This is something that you need to have special tools to rebuild pump, your best bet is buy a rebuilt from a rebuilder manufacture.

SOURCE: Need wiring schematic diagram for JD L130 lawn

You should price a new wiring harness,around $80 so there is not much reason to spend a lot of time trying to find shorts or open wiring.