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XJ550 seca/maxim wiring harness

Discussion in 'XJ Technical Chat' started by AFORSTER, Jun 12, 2019 at 10:24 AM.

  1. AFORSTER

    AFORSTER New Member

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    Hi,

    New here, just got an xj550 seca project on the go. Wiring was a mess so bought a new harness.

    In my haste i didn’t realise I’d bought a harness for an xj550 maxim.

    My question is, is there much/any difference between the harness’ ?? Or should I look at buying the correct harness
    Thanks
    Adam
     
  2. a100man

    a100man Well-Known Member

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    Interesting question.. I expect in could be made to work. The 'muricans should know for sure, one will be along in a minute or two ;-)
     
  3. a100man

    a100man Well-Known Member

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    Blimey, I was wrong. Best thing I can suggest is to check out this link to the interactive 'Seca' diagram and cross reference to the Maxim loom you have.
    Note that by using 'mouse over' you can even see where some wiring elements are supposed to 'live' on the frame. We are indebted to the guy that made this!

    Cheers
     
  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    seca has a fuel guage, volt meter, and 2 directional light indicators Seca does not have a separate bulb for license plate light the maxim does. that's the only things different between the 2 harnesses as far as electrical items.
    I do not know if the harnesses are the same physical size. I will look into it this weekend on Saturday. I have both harnesses on my bench



    The World’s Greatest XJ550 Seca Wiring Diagram:
    http://www.frankjohansson.com/stuff/xj550/XJ550ElectricalDiagram.html
     
    Last edited: Jun 13, 2019 at 6:13 PM
    Franz likes this.
  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    would have been here sooner just saw the post.
    the "parts" are all in the same location on the frame of the Maxim and Seca. but there is a slight difference in the frame Maxim is 100 mm longer.
     
  6. XJ550H

    XJ550H Well-Known Member Premium Member

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    on the maxim the turn indicator bulb grounds through the opposite blinker bulb than the direction you are turning. the 2 seca turn indicators ground to ground

    another thing is that the blinker connector pins can be a smaller diameter that the maxims.
     
    Last edited: Jun 13, 2019 at 7:30 PM
  7. AFORSTER

    AFORSTER New Member

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    Thanks so much for all your help, this clears things up loads! I might be able to make it work!

    Cheers,

    Adam
     
  8. XJ550H

    XJ550H Well-Known Member Premium Member

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    I must have sold the maxim harness but all the parts are in the same location on a maxim as a seca here is a dimentional layout.
    seca has 2 horns and tail light connector is different
    from headlight connector (without extendor to voltage regulator is 56 inches . zero point on drawing is the right controller connector, if you need more detail just ask I can photo harness at measure points and go deeper into all the connections
    xj550rj harness dimentions.jpg
     

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