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Old 14 January 2014, 11:42   #1
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Single Pole Nav Light Switch Wiring

I am currently wiring up a new carling on-off-on switch for the nav lights to replace a broken 2 rocker switch system. I had hoped that the switch ordered was a double pole switch but annoyingly it wasn't.

Have tried to fix with a diode (3A silicon rectifier type) using the arrangement on the pic attached.

1. Anchor light
2. Power in
3. Port & Stbd lights

The problem is that the anchor light is very dim for some reason. Could this be due to the type of diode used?

Thanks in advance!
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Old 14 January 2014, 12:12   #2
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Is the anchor light dim on it's own?
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Old 14 January 2014, 12:16   #3
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Yep it's dim on its own and dimmer when both are switched on. Diode has very low voltage drop so not sure really.
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Old 14 January 2014, 12:30   #4
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Disconnect 1 & 2 and join them together to see if the anchor light is brighter? if not then it will probably be a fault in the wire or bulb holder.

I'm no electronics expert but you will probably find that there will be a voltage drop through the diode to the anchor light when all the lights are on.
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Old 14 January 2014, 12:33   #5
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is the anchor light dim if you just connect a direct feed to it, not using the carling switch? if it's ok with a direct feed, then it's a problem with your switch. personally I wouldn't be adding anything to any electrical circuit on a rib that may cause a problem in the future, salt water and electrics are problematical enough at the best of times without introducing anything else, keep it simple and go for a "OFF-ON-ON" switch
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Old 14 January 2014, 12:38   #6
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Yep I kept mine simple too...

One carling switch for the anchor light and one for the red and green
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Old 14 January 2014, 12:41   #7
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Cheers chaps.

Yes I think simplicity is definitely the way to go knowing how much of a pain the rest of the electrics have been! Will have to bite the bullet and get the right switch rather than try to bodge it. Should have checked the first order
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