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Old 20-05-2022, 12:16   #1
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Wire labels?

Hi guy's,

I was wondering if anyone had any insight into the wire labels?
Is there a common way the builders label things.


My new dufour came with labels at the end of the wiring. The only thing is that I was never given a diagram or a list of the wires and the meaning of the labels.
I cannot get ahold of dufour and the dealership does not know.

In my case I have a relay that always feels hot and a 10 amp fuses that keep burning out, both wires neatly labeled however I it would be nice to know where to look.

Any links would be super helpful

Thanks
Paul
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Old 20-05-2022, 12:24   #2
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Re: Wire labels?

Google <Dufour wiring diagram>.
First return ➥ https://manualzz.com/doc/o/b2sd7/own...-panel-diagram
Second ➥ https://manualzz.com/doc/o/b2sd9/own...lation-diagram
Third ➥ https://www.manualslib.com/manual/16...e.html?page=55
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Old 20-05-2022, 13:38   #3
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Re: Wire labels?

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Originally Posted by GordMay View Post

Thanks Gord May,

I couldn't find RCO in any of the links you sent but those old manuals have I bit more info then mine came with.
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Old 20-05-2022, 13:45   #4
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Re: Wire labels?

Quote:
Originally Posted by GordMay View Post

Thanks Gord May,

I couldn't find RCO in any of the links you sent but those old manuals have I bit more info then mine came with.
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Old 20-05-2022, 14:23   #5
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Re: Wire labels?

Looking at the manuals Gord posted (you can get a downloadable PDF without the manualzz nonsense of the first one here) there is an R/S/T combo that consists of a relay (R), a fuse (S), and a "bilge fan" (T) that are the only thing that show up (in those wiring diagrams) as having the required combination of parts. Maybe "RCO" = relay, common. Maybe there is a fan/blower that is locked rotor?

There's also a relay "C" for the windlass remote that is wired to relay "R", with another fuse "K", so RCO could be the cable between R and C.Apologies, deeper look shows that wire is common to a terminal on distributor M but not between the two. I would guess that the pin on M is hot when the engine is on, to allow the windlass and bilge blower to run.

If you specified the model of Dufour and the year it could narrow the search.

Here's the 385 manual from the same site, and it also shows relay R for an engine compartment ventilator coming from the same distributor that presumably turns it on and allows windlass operation while the engine is running.

470 Manual sharing the same schematic.

34 Manual same schematic.
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Old 20-05-2022, 14:49   #6
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Re: Wire labels?

Quote:
Originally Posted by HeywoodJ View Post
Looking at the manuals Gord posted (you can get a downloadable PDF without the manualzz nonsense of the first one here) there is an R/S/T combo that consists of a relay (R), a fuse (S), and a "bilge fan" (T) that are the only thing that show up (in those wiring diagrams) as having the required combination of parts. Maybe "RCO" = relay, common. Maybe there is a fan/blower that is locked rotor?

There's also a relay "C" for the windlass remote that is wired to relay "R", with another fuse "K", so RCO could be the cable between R and C.Apologies, deeper look shows that wire is common to a terminal on distributor M but not between the two. I would guess that the pin on M is hot when the engine is on, to allow the windlass and bilge blower to run.

If you specified the model of Dufour and the year it could narrow the search.


Thank you,

Yes it is a 2021 Dufour 470.

We have had issues with the janky wiring that the boat came with.
We have been finding wiring with exposed bare ends, loose wires in the bilge stray unprotected wires and, nice well thought out wiring.
All of which is labeled.
I just wish I knew what the labels said.?
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Old 20-05-2022, 14:54   #7
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Re: Wire labels?

Only guessing, but in your photo that is probably fuse S, the other wire is the incoming +12V, then the RCO wire goes to relay R, COmmon terminal, and then the output terminal on the relay goes to your bilge/engine compartment blower. And if you are blowing the fuse regularly then the bearings on the blower are probably fried and the motor is locked.

All supposition and guesswork (moderately educated) because I've never seen the system.
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Old 20-05-2022, 15:09   #8
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Re: Wire labels?

Quote:
Originally Posted by HeywoodJ View Post
Only guessing, but in your photo that is probably fuse S, the other wire is the incoming +12V, then the RCO wire goes to relay R, COmmon terminal, and then the output terminal on the relay goes to your bilge/engine compartment blower. And if you are blowing the fuse regularly then the bearings on the blower are probably fried and the motor is locked.

All supposition and guesswork (moderately educated) because I've never seen the system.

I appreciate it,

It gives me some place to start looking.

I might consider putting labels with the name of the device these fuses and relays are supplying but first I have to identify them.

I will check the blower when I get back to the boat.

The actuator for the opening transom hasn't really worked since they handed me the boat.
I wonder if it could be related to that?
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Old 20-05-2022, 15:41   #9
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Re: Wire labels?

From the looks of it, the wire bringing power to the fuse, if it is the engine room blower, would only have 12V when the engine is running and the alternator is putting out power. So, is this a problem when the engine is running, or all the time?

The transom doesn't even show up in those schematics, so it must operate by magic.
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Old 20-05-2022, 15:50   #10
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Re: Wire labels?

Quote:
Originally Posted by HeywoodJ View Post
From the looks of it, the wire bringing power to the fuse, if it is the engine room blower, would only have 12V when the engine is running and the alternator is putting out power. So, is this a problem when the engine is running, or all the time?

The transom doesn't even show up in those schematics, so it must operate by magic.
I honestly don't know other than the fuse is in an awkward location and I found it trying to troubleshoot the phantom transom actuator.

I will check when I get back to the boat to verify the that the blower functions when the engine is on.


Paul
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Old 20-05-2022, 16:29   #11
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Re: Wire labels?

Quote:
Originally Posted by Asspload View Post
I honestly don't know other than the fuse is in an awkward location and I found it trying to troubleshoot the phantom transom actuator.

I will check when I get back to the boat to verify the that the blower functions when the engine is on.


Paul
That the blower functions
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