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  1. #1
    New Member
    Join Date
    Jun 2012
    Posts
    11
    Location
    Red Bud, IL
    Tractor
    CIH MX 285

    Default John Deere 6420 Auto Light is always on

    We have a John Deere 6420 and the auto light, located near the PTO lights on the right of the cab, is always on. I cant find out what it means or why it came on. Our tractor still runs the same. Thanks for the help.

  2. #2
    Elite Member Zebrafive's Avatar
    Join Date
    Aug 2010
    Posts
    3,351
    Location
    South West MI
    Tractor
    John Deere 2030, John Deere 6415

    Default Re: John Deere 6420 Auto Light is always on

    It means Auto Shifting is ON.
    Do you have the AutoQuad Plus trans? On your gear range lever knob are there three buttons? If so, rear most engages Auto Shifting. Press it and light should be off.
    John Deere 2030 JD 245SL Loader
    John Deere 6415 mfwd JD 640SL Loader

  3. #3
    New Member
    Join Date
    Jun 2012
    Posts
    11
    Location
    Red Bud, IL
    Tractor
    CIH MX 285

    Default Re: John Deere 6420 Auto Light is always on

    No, we don't have an auto quad Trans. We only have two buttons on the range lever... Faulty sensor?

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