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Azimut 78 wiring question

Discussion in 'Azimut Yacht' started by Mpretor, Apr 8, 2019.

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  1. Mpretor, Apr 8, 2019
    #1
    Mpretor

    Mpretor New Member

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    Apr 8, 2019
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    Mexico
    Hi all!

    I'm new to this forum, what a great resource!

    I'm working on a mid '90s azimut 78 in Baja Mexico, and am looking either for a wiring schematic or else any tips for the 24vdc system, specifically the power supply to each of the four heads.

    Anyone have a diagram or know where the heads pull power from, and are there fuses inline, and if so where are they? I suspect there are two branches: one for fwd two heads and one for aft two heads?

    There are very few diagrams or documents on board.

    Thanks guys for any advice!
  2. Capt J, Apr 9, 2019
    #2
    Capt J

    Capt J Senior Member

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    The heads pull power from a small breaker panel in each of the adjoining stateroom closets. These sub panels may have a breaker inside or behind another breaker panel in the boat. Sometimes you have to open the panels and there is another row of breakers behind the ones you can visually see.

    Even if there was a wiring diagram, it would be totally useless as Azimut used about 7 different electrical sub-contracting companies back then and NONE of them followed the wiring diagrams when they ran the electrical.
  3. Mpretor, Apr 9, 2019
    #3
    Mpretor

    Mpretor New Member

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    Thanks Capt J! I'll pull the sub panel fronts today and see what I find. There isn't a fuse on the panels for the heads, but like you're saying maybe there's something behind it. I'll keep you posted, thanks again for the info!!
  4. Mpretor, Apr 9, 2019
    #4
    Mpretor

    Mpretor New Member

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    No luck on the cabin subpanels, unfortunately. I took the faces off, accounted for all the wiring in there and nothing is in there for the heads.

    Any other ideas or advice? Understand it's pretty tricky since it sounds like these were all done a bit differently.

    A little more detail: I'm installing new heads that draw a little more than the old ones, though the wiring size is still in spec. In testing the new heads, one head up forward seemed to trip and and take both fwd heads down with it, same was then true for the aft section - one head "tripping" took both aft ones down. No voltage showing on their supply wires where I used to have 24v DC. I assume it's a fuse or breaker that I need to find.

    I've checked all the subpanels except for the engine room subpanel that I'm still working on locating. Nothing on the main DC panel either.

    If I can't make headway on tracing the wiring I guess I'll just run new power supplies from each cabins subpanel. Wiring size is ample for it, just trying to avoid the work and inelegant solution if I can.

    I appreciate any tips or advice, thanks for the help so far!
  5. wdrzal, Apr 9, 2019
    #5
    wdrzal

    wdrzal Senior Member

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    Google ( electrical wire tracer ) I have commercial tone generators and tracer wands for telephone/ethernet, thermostats and energized lines of all voltages, Got a small fortune in name brand stuff . But you now can get ones to trace 120 and 240 volt and low voltages cheap . There is a lot out there so be sure you understand how they work and most importantly is if they work on only de-energized circuits or Both or only energized circuits and know the voltage ranges . Now similar tools at Lowes or home depot can be brought for really cheap ,$ 20.00 to $100.00 bucks. If you work with wires you should have tools like this to sort circuits out in your tool box.
  6. Mpretor, Apr 9, 2019
    #6
    Mpretor

    Mpretor New Member

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    Thanks for this tip, very helpful!
  7. Mpretor, Apr 9, 2019
    #7
    Mpretor

    Mpretor New Member

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    Found the blown fuse today, a small glass fuse in the engine room. Thanks for everyone's help and advice!
  8. Pascal, Apr 10, 2019
    #8
    Pascal

    Pascal Senior Member

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    Glad you figured it out... so one fuse in the ER kills all the heads?? And folks make fun of British Lucas electrical :)
  9. Capt Ralph, Apr 10, 2019
    #9
    Capt Ralph

    Capt Ralph Senior Member

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    Lucky it was in a fuse. With out the fuse, the Mut Smoke could have escaped.
    It's SOP to have a spare can of Lucas Smoke to re-inject. Never was able to obtain a spare can of Mut Smoke.