Electrical fault

yorammelnik

yorammelnik

.
Jan 12, 2015
38
beneteau oceanis 390 herzelia
Hi,
2/3 of the switches on my electrical panel stopped working. Attached are pics of the forward and backward sides of the panel.
Switches 1 through 12 don't work and 13 through 16 do work.
Using a voltmeter I see that when I turn a faulty switch on the corresponding green light turns on (at the front of the panel) but there is no voltage on the "+" and "-" corresponding screws at the back of the panel. On a switch that works (13-16) the voltage is 13v as the voltage of the battery.
Checking the red PLUS cable that feeds the panel (on the right side of the picture) I see that there is current and the GOUND is OK too (same voltage as the battery).
I am not an electrician but it seems that on the panel itself there is a shortage that prevents current from getting to the faulty switches. Does it make sense?
Anyone experienced something similar?
Any ideas what to do?
Thanks
Yoram
 

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joker460

joker460

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Apr 27, 2010
968
Beneteau 352 Hull #276 Ontario
Not Having the schematic in front of me makes it a little more difficult.
I would investigate the area I circled. The heavy red wire is most likely the positive lead supplying 12v to the panel. Also the heavy black lead is most likely the negative. You can use a voltmeter to check if these are actually supplying voltage to the panel.
If not, then the problem is probably back at the battery switches. There may be fusing in those positive and negative leads back to the switches.
The PCB area circled is also discolored indicating some excessive heat. May or may not be an issue.
Good Luck.
 

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Davidasailor26

Davidasailor26

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May 17, 2004
5,695
Beneteau Oceanis 37 Havre de Grace
The discolored area didn't look good to me either. I'd look closer around there for any corroded connections or burnt components. Beyond that, just keep poking with a volt meter (on the volts setting) and follow the red lines to see where you stop getting voltage between red and ground.
 
yorammelnik

yorammelnik

.
Jan 12, 2015
38
beneteau oceanis 390 herzelia
The red and black "heavy" wires do supply correct voltage to the panel.
Ill check into the discolored area.
thanks
 
DougM

DougM

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Jul 24, 2005
2,242
Beneteau 323 Manistee, MI
Looking at the layout of the panel, without a diagram I would think that you have an "open"connection between the 13-16 section and the adjacent sections. In the circled area in photo 3 it looks like something got really hot and may have burned through connection on the back side of that plate. That is where I would start looking.
Possibly the red wire is "daisy chained" from 13-16 to 7-12, then to 1-6 which is why 13-16 still function.
 
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