John Deere - 4440 Wiring Diagram

: You can view the full John Deere 4440 Technical Manual TM1182 on Scribd , which includes Section 240 for electrical operation and tests.

A complete wiring diagram for the 4440, such as the one found in the Technical Manual TM1182 , is divided into several key harnesses: John Deere 4440 Instrument Panel Ground John Deere 4440 Wiring Diagram

On your wiring diagram, trace the heavy gauge red wire from the alternator’s "BAT" terminal. This is the main output. It travels to the ammeter shunt and then to the battery terminal on the starter solenoid. If this wire is corroded or broken, the batteries will never charge. The "R" terminal on the alternator (sometimes marked with a number like 1 or 2 depending on the retrofit) is the sensing terminal. The wiring diagram will show this wire running to the ignition switch or a junction block. If this sense wire fails, the alternator won't know the battery needs charging. : You can view the full John Deere