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 I think I fried my battery switch!		  New Topic  Topic Locked
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megrier
1st Mate

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USA
55 Posts
Initially Posted - 08/23/2004 :  09:50:04  Show Profile
My batteries would not take a charge this past week and I started thinking that they just needed to be replaced. So I pulled them out and took them home and put the old battery charger on them to be sure. After about 5 hours at 10 amps they both charged right back up.

So, this means that I have a problem on the boat charging system. I have never had a boat with a built in charger and battery switch before so I am not sure where to start to figure this out.

I remember reading somewhere that you should not change the battery switch while the engine is running because it will blow some type of diode or something. Is this true? If it is true than that is what I have done to cause this problem.

Any help or ideas will be much appreciated!

Greg
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matsche
Captain

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USA
280 Posts
Response Posted - 08/23/2004 :  10:19:35  Show Profile
If you have a decent 3 stage battery charger on board, then it should be hooked up directly to your battery and not via the switch. Otherwise the charger's "sensing" ability is greatly diminished. Maybe that's the problem?

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by megrier</i>
<br />I remember reading somewhere that you should not change the battery switch while the engine is running because it will blow some type of diode or something. Is this true?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

yep, I've heard that too, but I can't imagine that that affected your switch.
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 08/23/2004 :  13:35:47  Show Profile
Greg,

The caution that you are referring to is the ,"don't switch the batteries off or on while the motor is running cause it might fry the diodes in the motor charging system". The switch shouldn't be compromized if you do, just the motor charging system.

So is this what you are referring to? Perhaps.

Val on Calista # 3936
Patchogue, N.Y.
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megrier
1st Mate

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USA
55 Posts
Response Posted - 08/23/2004 :  14:12:30  Show Profile
Yes, I think that is what I remember. So, I know that I was not recieving any charge from the engine to the batteries because I had run the engine at 3/4 to full throttle for an hour and the batteries couldn't even run the radio. I also tried charging them at the dock from shore power but they did not get any juice. So, would that lead me to the charger on the boat or the battery switch or both as my problem?

Greg
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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts
Response Posted - 08/23/2004 :  20:11:34  Show Profile  Visit Frank Hopper's Homepage
Or simple corrosion. Take every connection off and clean each part with emery cloth and reassemble, see what you get.
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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.