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Thread: Ammeter for VL Instrument Dash

  1. #1
    Join Date
    Jul 2008
    Location
    North Carolina
    Posts
    642

    Default Ammeter for VL Instrument Dash

    I am assembling my VL instrument panel/dash. Before I button it up; I wanted to confirm that the negative post of the ammeter is grounded to the dash base and not isolated like the positive post?
    Thanks, William
    William Edwards, AMCA #10035

    Attend the 2019 Southern National Meet at Denton Farmpark, NC, 17-18 May 2019
    http://www.amcasouthernnationalmeet.com/

  2. #2
    Join Date
    Feb 2011
    Location
    Pa
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    99

    Default

    Yup, that’s correct. The problem is that the ground terminal on one type of gauge is opposite on the other type of gauge. The way I understand it is the Weston has the left side grounded to the dash base while the later Delcos ground the right side terminal. You can also run an additional ground wire from your ammeter ground to the frame.

  3. #3
    Join Date
    Feb 2011
    Location
    Pa
    Posts
    99

    Default

    You haven’t got an extra chrome dash light cover do you? Part #4566-29, I need one to finish my dash.

  4. #4
    Join Date
    Jul 2008
    Location
    North Carolina
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    642

    Default

    Thanks Dusty. I have a Weston meter, a wiring diagram showing the Delco meter and what I assume a dash base setup for the Delco meter polarity arrangement. I connected a load then a charge to confirm my polarity. Sorry, I do not have an extra chrome light cover. Check with Tom at Replicant Metals for a chrome cover.

    http://www.replicantmetals.com/slide...-29/index.html
    William Edwards, AMCA #10035

    Attend the 2019 Southern National Meet at Denton Farmpark, NC, 17-18 May 2019
    http://www.amcasouthernnationalmeet.com/

  5. #5
    Join Date
    Jan 2003
    Location
    England
    Posts
    1,323

    Default

    Yup, the white face ammeter is upside down compared with the Weston, so the ground terminal is on the right rather than the left. The problem is that Harley doctored up the earlier dash wiring diagram for the 1934-36 owners handbook without making this change, so the wiring diagram is incorrect. Shop Dope reports blown headlamp bulbs in early 1935, so I suspect the bikes were maybe leaving the factory incorrectly wired. The advice was to run an extra ground wire from the ammeter to the frame (under the 3344-25 timer coil clip) and to retrofit this for earlier models, which is still good advice.

  6. #6
    Join Date
    Jul 2008
    Location
    North Carolina
    Posts
    642

    Default

    Thanks Steve. Makes sense with frame grounding is through the neck bearings.
    William Edwards, AMCA #10035

    Attend the 2019 Southern National Meet at Denton Farmpark, NC, 17-18 May 2019
    http://www.amcasouthernnationalmeet.com/

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