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  1. #1
    Click avatar for tech links/info K447's Avatar
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    GP1800 Wiring diagram errors, Yamaha Factory service manual

    I have been bringing myself up to speed on the electrical system in my GP1800, including reviewing the wiring diagram in the back of the official Yamaha Waverunner GP1800 2017 Service Manual.

    Purchased from the forum's online store.

    LIT-18616-03-72
    F3P-28197-ZV-11

    I am finding what appear to be obvious errors in the wiring diagram, which makes me concerned that there are other less visible errors not yet noticed.

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    Last edited by K447; 06-18-2017 at 09:27 AM.

  2. #2
    Click avatar for tech links/info K447's Avatar
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    Wiring diagram, start solenoid connected to ground at starter motor?



    This portion of the wiring diagram (back page fold-out in the printed manual) seems to show the battery negative NOT connected to starter motor/engine ground. Instead the ground symbol is shown on the solenoid connection to starter motor, which seems rather incorrect.

    Compounding the apparent error, the wire color from solenoid to starter motor is not shown as red. It is a black line marked with B.
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  3. #3

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    I will reply with the first word that came to mind when i read that... Damn it. Lol. That sux. How bad is the mix up? If yamaha is the publisher you may be able to get them on the phone and correct it. But if you keep finding errors they may need to pay you for doing their job at that point.

    Edit.... We posted at same time almost so now i see the mix up lol

  4. #4
    Click avatar for tech links/info K447's Avatar
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    Start solenoid coil is grounded in diagram, would bypass Remote Control Receiver?



    Page 7-4 shows the start solenoid coil being connected to the Remote control receiver and connected to ground (circled by me in orange). I suspect the solenoid coil is actually only connected into the remote control receiver, and is not directly connected to ground.
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    Last edited by K447; 06-18-2017 at 09:17 AM.


  5. #5
    Click avatar for tech links/info K447's Avatar
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    It is not helpful that in some wiring diagrams there is no mention of the wire color coding (such as the above). Also, the fuses are identified with letters on the big wire diagram, but numbered on this one?



    The fuses on the colored diagram are not marked with the amp rating or function, nor am I seeing a straightforward way to correlate the physical location of the fuse in the fuse panel with the same fuse on this wiring diagram.

    10. Fuse (3 A) (Not Used) is shown on the colored diagram as fuse b, but it is not clear to me that it is actually 'unused'.
    I was wondering if perhaps it would be usable for bilge pump or other add-on equipment?




    BTW, what is the 'entry box' listed for A above?

  6. #6

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    At least it shows the correct style fuse box and where the fuses are at unlike the manual i got for the 2015 fz/fx svho's hahaha

  7. #7
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by MWHC View Post
    At least it shows the correct style fuse box and where the fuses are at unlike the manual i got for the 2015 fz/fx svho's hahaha
    PM from another member;

    Quote Originally Posted by ___
    the vxs/vxr wiring shows the same error for the starter .

    And the vxr/vxs/vx-ho have the liner cut around intake brackets just like the gp1800.
    I expected the existing wiring diagrams were just revised each model and year with whatever was 'changed'. Which means that original/older errors are propagated forward.

    The disappointing aspect would be that Yamaha clearly does not have a good feedback system for reporting of user/technition discovered documentation errors and then correcting the documents.

    So, how many years back has the official wiring diagram for the Yamaha start solenoid been incorrectly 'grounded' on the wrong side of the starter motor?

  8. #8
    TimeBandit's Avatar
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    Quote Originally Posted by K447 View Post


    ........ I suspect the solenoid coil is actually only connected into the remote control receiver, and is not directly connected to ground.
    Correct - no added ground point there.

    FWIW, I have a 2009-2012 FX HO SHO shop Manual (pdf only), and it does not show these errors.
    LIT-18616-03-41
    F2S-28197-1R-11
    pdf file date is 4/14/2015

  9. #9
    Click avatar for tech links/info K447's Avatar
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    Arrow Corrected and color coded fuse diagram, annotated fuse and relay wiring

    Note: This is a work in progress. If you see any errors or omissions, please let me know.

    Attached are corrected and color coded GP1800 fuse diagram, fuse and relay wiring.
    Also see attached PDF files for better image quality.






    For the Remote Control solenoid control wiring the erroneous ground symbol has been grayed.
    See attached PDF file



    Quote Originally Posted by K447 View Post
    It is not helpful that in some wiring diagrams there is no mention of the wire color coding (such as the above). Also, the fuses are identified with letters on the big wire diagram, but numbered on this one?

    ...

    The fuses on the colored diagram are not marked with the amp rating or function, nor am I seeing a straightforward way to correlate the physical location of the fuse in the fuse panel with the same fuse on this wiring diagram.

    10. Fuse (3 A) (Not Used) is shown on the colored diagram as fuse b, but it is not clear to me that it is actually 'unused'.
    I was wondering if perhaps it would be usable for bilge pump or other add-on equipment?
    ...

    BTW, what is the 'entry box' listed for A above?
    I still have not traced what the A connection goes to. Anyone have info?
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ID:	426440   Yamaha 2017 GP1800 Service Manual 7-4 (Remote Control Receiver Start Solenoid, corrected).pdf  
    Last edited by K447; 01-15-2018 at 08:13 PM.

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  11. #10
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    Yamaha manuals are infamous in my world for all sorts of wiring diagram errors, which by the way never get corrected.

    I ran into one a few years ago, as I wasn't really all that familiar with yamaha ignitions.

    Some 1200 triples have a single cdi trigger..others use a trio of triggers

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