4wd not disengaging on John Deere 6220

[Industrial Toys]

I too would guess a ground issue.

Not knowing the circumtances, but it astounds me that anyone could think a machine works one day, not the next and then consider mixed up wiring. Believe me, I have seen it. People switching wires and terminals around, thinking that may do the trick. Makes it much more fun for the person having to repair it in the end.

 

[lalek5000]

Hi, i have a 5820 with similar issues: brake lights don’t work, 4wd is constantly on (atleast the light). I did replace brake light switch but nothing changed. Also checked fuses. There is also 8v at the solenoid connector.
I hope you fixed yours.

 

[Mike1955]

We must bear in mind there are circuit boards in play, hence the eight volts. And also do we know the operating voltage of the solenoids, for a fact? These machines were not built simply