Posted 5/7/2017 18:18 (#6005471 - in reply to #6005398) Subject: RE: Code HCU 55 John Deere 8400
Elizabethtown,KY
I had the dealer do a 7810 for me several years ago, mine would only work with the switch outside on the rear fender, mine took a new hitch position sensor. I'd bet a calibration will fix yours.
I've only owned 7000 series tractors, but I believe the procedure is in the manual.
Code HCU 55 John Deere 8400
