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short

Old 05-20-2008, 11:20 AM
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Default short

Thought I found all the shorts in my pacific(blacklab)23ht , but I didn't. I still have a short to ground in the main switch panel. Any switch I turn on causes a short between the hull and +12 volt lead. I would think this would blow a fuse, but it has not, so I'm having trouble finding the short. Removing all the fuses removes the short, but if I put back in any fuse the short returns. This indicates the short is not on the load side of the fuse but on the switch wiring itself. I wish I had the scematics of how this boat was wired. Does anyone know if these are double pole single throw fuses? How is the fuel gauge wired? Is it fused too?
Adrian
Old 05-20-2008, 12:41 PM
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Default Re: short

This one has me stumped. Any ideas?
Old 05-20-2008, 01:35 PM
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Default RE: short

A short should blow a fuse or trip a breaker.

I bet you have water in a connector or breaker which will permit voltage but no current.

I helped a friend troubleshoot his boat this past weekend. I measure 12V at his helm panel with GPS, FF VHF powered up.

Once I turned on anything that drew current, (wiper,horn,lights) the voltage dropped to ZERO and the main 40 amp breaker near the battery didn't trip.

I finally found water in the 10 gauge wire "quick disconnect " near the 40A breaker. The owner finally admitted spraying water near the connector.

I cleaned the connector and applied some CR spray....bingo ! Good to go !









Old 05-20-2008, 02:06 PM
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Default Re: short

Thanks, sounds like the problem. I'll bet I have water in one or more of those switches or a wire . I guess I'll have to disconnect one at a time till I find it.
Adrian

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