Under dash wiring 1995 grand sport

Discussion in 'Engine Questions' started by Peter owens, Mar 24, 2015.

  1. Peter owens

    Peter owens New Hydrodyner

    Joined:
    Mar 24, 2015
    Messages:
    4
    Boat Model and Year:
    1994 grand sport
    image.jpg Hello all
    I just bought my first hydrodine
    It's a 94 grand sport
    I hand it shipped to me in Australia
    But they took the dash off to save in hight when shipping
    I have found that under the dash screwed to the deck is a small circuit board
    And around 9 wire to go to it
    Help
    Can anyone get me a picture from there boat showing where wires go
    And what is this board for
    Thanks all
    Peter
     
  2. jim

    jim Hydrodyne 18 Specialist

    Joined:
    Jun 14, 2006
    Messages:
    2,321
    Location:
    FL
    Boat Model and Year:
    77 Dyne 18 I/O converted to Outboard
    Hi Peter, and welcome to the forum,

    Boat wiring is usually fairly simple. There are not many systems. I think the best advice I an give you is to find someone that understands it and have them walk you through it, or do it for you.

    jim
     
  3. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    I'm not sure what the circuit board is for but you can decode it by the color of the wires going to it/comeing from it. If not you could probably get rid of it and re-wire your dash by color codes. Is the circuit board totally disconnected? Black is always ground and red is always battery. Assuming you have a Mercruiser engine purple is ignition (same as battery but only live with the key on), gray is tach. Look at your bilge and light switches and see where power is comeing from. I have a Merc outboard wiring color code chart that I can post if you think it would help.
     
  4. kevinb

    kevinb Elite Hydrodyner

    Joined:
    Sep 10, 2006
    Messages:
    459
    Location:
    Brookfield, WI
    Boat Model and Year:
    1985 HD 20' I/O 350 (Yep I/O Boat #2 of maybe7?)
    Ski Team:
    NA
    Hi Peter and folks:

    The newer boats (especially the inboards) have gone to a complex wiring harness which can be very taxing for us old school folks. The wiring color codes also may vary as well from the manufacturer. Maybe you will get some support from someone who has a similar Hydrodyne vintage on this site but the older hulls were kept pretty simple.

    My best and good luck sorting,

    Kevin-
     
  5. Peter owens

    Peter owens New Hydrodyner

    Joined:
    Mar 24, 2015
    Messages:
    4
    Boat Model and Year:
    1994 grand sport
    Hello all
    Thanks for your help
    Looks like maybe a perfect pass board that's not in boat anymore
     

    Attached Files:

  6. Tom_H

    Tom_H Hydrodyner

    Joined:
    Jun 4, 2013
    Messages:
    40
    Location:
    White Bear, MN
    Boat Model and Year:
    1994 Grand Sport
    Ski Team:
    Ski Otters
    Peter,
    Mine's not out of storage yet (probably grab it sometime this month now that we have ice-out). I'll look under my dash and see if I have anything similar, but it doesn't strike me as terribly familiar.
     
    Peter owens likes this.
  7. Peter owens

    Peter owens New Hydrodyner

    Joined:
    Mar 24, 2015
    Messages:
    4
    Boat Model and Year:
    1994 grand sport
    Thanks
     
  8. tj309

    tj309 Composite Specialist

    Joined:
    Jul 19, 2010
    Messages:
    399
    Location:
    LA (lower Alabama)
    Boat Model and Year:
    1972 18' Hydrodyne
    Ski Team:
    Former Hodag Water shows
    It is probably an aftermarket add-on. I would not worry about it as gauge wiring is pretty easy. All you need to do is identify the hot (red) wire, and the ground (black) and take it from there with senders and signal wires.
     
  9. Tom_H

    Tom_H Hydrodyner

    Joined:
    Jun 4, 2013
    Messages:
    40
    Location:
    White Bear, MN
    Boat Model and Year:
    1994 Grand Sport
    Ski Team:
    Ski Otters
    Peter - I took a peek under my dash quick last night, and the only thing that might include that board is the attached picture (which I believe is the ignition beeper - the tone for key on/engine off). It was already late after doing a few other projects, so I didn't have the time to see if it comes apart or not. I see about 8 or 9 wires in the harness going into it, which would seem to match up with the number of blade connectors on the board you have. If I can find some time tonight, I'll try to open it up to get you a picture of what wire goes where.

    20150504_230610.jpg

    It's located pretty much directly behind the helm.
     
  10. Peter owens

    Peter owens New Hydrodyner

    Joined:
    Mar 24, 2015
    Messages:
    4
    Boat Model and Year:
    1994 grand sport
    Thanks
    That might be it
    When I turn the key no beeps
    Like merc cruiser low oil etc
    Even though a PCM
    Engine run fine all gauges are working to
     

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