Without the diagram, you are guessing. With it, you can:
Do not rely on generic “John Deere 270 wiring diagram” images from forums—many are mislabeled or for different serial number breaks (early vs. late 270 had different interlock logic). Get the (available as PDF from John Deere’s TechPubs site or reputable resellers). That one diagram will save you hours of guesswork. John Deere 270 Wiring Diagram
: This ~500-page manual includes full schematics, component locations, and troubleshooting charts. Stand-alone Electrical Schematics Without the diagram, you are guessing