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kenz
Deckhand

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USA
18 Posts
Initially Posted - 10/30/2003 :  20:03:33  Show Profile
As I was sailing my c25 to her winter resting place, I noticed that my knot meter and my depth finder was not working. I checked all the other electricl appliances and everything works. I even checked the batteries and all the fuses are good in the circuit braker.
Any ideas

Ken
Kenneth Zwibel
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ClamBeach
Master Marine Consultant

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3072 Posts
Response Posted - 10/30/2003 :  21:21:13  Show Profile
Having a VOM (Volt-Ohm-Meter) is pretty handy for troubleshooting problems like this. An inexpensive variety from Radio Shack will tell you if you have voltage to the knotmeter connections.

If you have 12V at the terminals, there is a possibility that the unit itself has failed. Otherwise you'll need to trace the power supply wires back to their source and see where you 'lose power' in the circuit.

Corroded or otherwise degraded connections are often the cause of problems like this.
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Bill Holcomb
Admiral

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USA
769 Posts
Response Posted - 10/31/2003 :  09:49:49  Show Profile
Hi Ken,

Make sure that you check the battery terminals as well as the connections at the switch panel for corrosion. It doesn't take much to restrict those little electrons. Of course, if the 12VDC circuits to your knot meter and depth sounder have wire splices, check these as well.

Bill Holcomb - C25 Snickerdoodle #4839
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deastburn
Captain

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USA
334 Posts
Response Posted - 10/31/2003 :  11:28:08  Show Profile
When you say "not working", do you mean giving no readout at all (ie. "switched off") or simply reading out "0.00"? If the latter, I would suspect algae or weed buildup if the boat has been in the water for long, and not an electrical problem. (No matter what coating I use, my paddle-wheel knotmeter has never gone an entire season in the water without the need for underwater cleaning.) If you have simply blank screens, then they must be getting no juice, since even a bad depthsounder will give some kind of a readout (usually "-.--"). Besides, it is highly unlikely that both went bad at the same time. In addition to checking the panel fuses, I'd suggest you also check the inline fuses, since it is likely that each of these instruments has both. Simply follow the wires back to their connection with the power source (which should be the main or auxiliary fuse panel), and you'll find an inline "Buss-type" fuse. Good Luck!
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LOREN SOUERS
Navigator

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USA
100 Posts
Response Posted - 10/31/2003 :  14:10:44  Show Profile
Ken,
I don't know your exact problem i.e. no power or not working right, but my depth sounder sort of works as a voltmeter for me. If the voltage on my batteries gets too low, the depth sounder stops working. Then I know its time to charge the batteries. Ditto on the suggestion about checking with a voltmeter.

Loren Souers, skipper
Nimue, the Lady of the Lake (on the hard til May )
Edited by - LOREN SOUERS on 10/31/2003 14:12:30
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.