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  1. #1
    New Member
    Join Date
    Oct 2010
    1968 john deere 4020

    Default jd 4020 headlight switch wireing

    need to know if anyone has schematic for headlight switch (tractor is now 12 volt

  2. #2
    Elite Member JasG's Avatar
    Join Date
    Jan 2004
    Kubota L3240

    Default Re: jd 4020 headlight switch wireing

    You should be able to find it at or I picked one up at the local Deere dealer when I needed it to fix my friends 4020 light. I don't know where they are now, or I would scan and send.

  3. #3
    Super Star Member
    Join Date
    Feb 2008
    somewhere usa
    Deere 110tlb, 4520, x749, L130

    Default Re: jd 4020 headlight switch wireing

    If it were me I would rewire the lighting circuits on a machine with that much age. The wiring wasn't protected that well and new sleeving and wire would eliminate alot of future problems with it. At the least I would go over the wiring with a fine tooth comb looking for abrasions and cracks. This is a low cost problem solver imo.

  4. #4
    Gold Member
    Join Date
    Jun 2006
    Massey Ferguson 2135

    Default Re: jd 4020 headlight switch wireing

    What year? Was it originally a 24 volt system?

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