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  #1  
Old 12-08-2012
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Faulty Starboard Running Light

I have just purchased a 1982 C&C34 and have found that the starboard running light does not work. The port one works fine. Have tried changing the bulb, no help. I don't even know where to start looking. Would there be somewhere I could get a wiring diagram or schematic. Help Please.
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Old 12-08-2012
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Re: Faulty Starboard Running Light

The first place to look would be corrosion on the pins in the fixture, if you have a voltmeter check for voltage across the pins of the fixture once you've cleaned things up. If you get 12V or so then a new bulb should work. If not, then you're likely looking for a broken wire. Try looking in the anchor locker for where the wires are likely routed.. Are these pulpit mounted or in-hull? Either way start tracing wires looking for a break or a lousy connection.

My first bet will be corrosion on the fitting.

Good luck!
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Old 12-08-2012
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Re: Faulty Starboard Running Light

There is some corrosion around the bulb end sockets, I tried to clean it as best I could but did not have a proper tool. Next week when I go to the boat I will take a volt meter and something to clean the end sockets. I sure hope I don't have to start tracing the wires. There must be a junction box or a wire split close by where the wiring splits to port and starboard. Thanks
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Old 12-08-2012
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Re: Faulty Starboard Running Light

Does your wire come up through the tubing on the bow like mine does. Sometimes they get corroded and cut at the entrance to the tubing. I would chack the points that faster mentioned first. OE on C&C will eventually allow water and corrosion into the light fixtures. I replaced by port and starboard with a single aquasignal on the bow.
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Old 12-09-2012
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Re: Faulty Starboard Running Light

This may be a bit obvious, but if you don't have a meter with you, open the working port side light and use the known good bulb to test the starboard.
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Re: Faulty Starboard Running Light

Since International Colregs have for years required sidelights to be above the gunnel and your original lights do not meet current standards for brightness.... it may be a good time to consider new fixtures.
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Re: Faulty Starboard Running Light

I highly suspect this problem is at the fixture. Either the bulb contact inside, which you need to clean up with a file or sandpaper, or at the wire connections behind it. You may have a buried cut wire, but I doubt it, if the other side is coming on. Do they both operate off the same incoming power line?
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Old 12-09-2012
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Re: Faulty Starboard Running Light

Boatpoker - My running lights are above the gunwale on the bow pulpit so they may have been changed from their original position.

I have exchanged the bulbs in the port and starboard fixtures so the bulbs are good. I hope that it is just corrosion in the bulb holder which I will clean up on my next visit to the boat.

Thanks for all the help. . Hal
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Old 12-09-2012
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Re: Faulty Starboard Running Light

As to wiring diagrams - no such thing for 99.9999999 percent of the boats out there. You might find a page or two with esoteric lines and squiggles but there is nothing that says "remove the xxx cover and find the green wire".

Those you make yourself by digging and picking and taking pictures.

For older boats (pre ABYC standards) it'll most likely be white, red, black or what ever was cheapest at the supplier that month, and vary boat to boat.
If it is not the fixture, then it's the wire. More often that not the best way to fix that is to run a new one. Along the way you will find the old one.
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Old 12-16-2012
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Re: Faulty Starboard Running Light

If you end up doing any signifcant work here strongly consider popping in some new LED lights. They'll consume 1/10th the power and never burn out again. I just installed these when my starboard light failed.

Sea-Dog LED Port & Starboard Navigation Light Pair

They actually look better than that picture which has been photoshopped to show the red and green. On the actual light the color comes from the LED and the glass (actually plastic) is clear.
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