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Old 03-27-2013, 11:07 PM   #1
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Default Battery Sparks when I hookup neg terminal

I connected the POS terminal first, then when I connect the NEG I get a little spark. I never noticed this before on my other boats!
Everything is off, Battery switch is off, Shore power is disconected. Do I have a short somewhere?


Todd
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Old 03-28-2013, 12:23 AM   #2
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Todd that is why you always connect the negative last. That spark is going to your ground plate and doing nothing.

I don't know why it is sparks have not gotten that far at battery U but it will hurt nothing as long it is connected last.

Roger
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Old 03-28-2013, 01:48 AM   #3
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Roger. Thanks I wasn't sure.

Todd

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Old 03-28-2013, 01:58 AM   #4
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Todd, that means you have a draw on the system. It does not matter if you connect + or - last, if there is some sort of draw, it will spark. If the draw is larger than the spark will also be more. Are you sure nothing is wired directly to the battery and bypassing the battery switch? Maybe the stereo or bilge float switch?
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Old 03-28-2013, 10:33 AM   #5
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My 2007 2600 does the same. I have a direct wired load which includes the CO monitor, Stereo memory, and Mercathode system. These are always wired around the battery switch to keep them powered. Bilge pump is as well, but mine is always dry so it is not causing a draw.
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Old 03-28-2013, 01:07 PM   #6
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Exactly as Mc and Paul say, something is "on"; stereo memory, CO monitor, MercCath, a cabin or cockpit light, etc.
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Old 03-28-2013, 01:51 PM   #7
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I maybe a little overly concerned about this but, I am out on the water at all hours of the night and just don't want to hit the Key to start the Eng and have a dead battery.


I found my Digital Multi-meter. I guess I'll hook it up to the Battery to measure Current, then start pulling Fuses to find out where the draw is coming from.

http://scienceshareware.com/how-to-m...with-a-dmm.htm


I'm thinking something is drawing power, (worried about Draining the Battery) only thing that is hot is the bilge pumps but they aren't running (Land Locked right now on the trailer). Wiring is not one of my better talent's so I am not too proud to ask for advice!

- Bilge pump's are wired to the Float Switch but the boat is bone dry
- refrigerator is OFF
- Battery switch is OFF
- Shore Power is Disconnected
- Mercathode system - N/A
- CO monitor - N/A
- CB Pannel - All CB's are Off
- Radio is only powered when the Battery switch is on (1, 2, or Both)
- All the Switches at the Helm are OFF
- all Lights interior, exterior, running, anchor - OFF
- Trailer Trim

Todd
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Old 03-28-2013, 02:21 PM   #8
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I'll ask my boss at work what is going on for the spark on the negative side to happen...........


Roger
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Old 03-28-2013, 02:50 PM   #9
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Todd, you probably want to use a test light instead of a multimeter.
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Old 03-28-2013, 03:16 PM   #10
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If I was just checking for power a light would be better. But I want to see a current draw from the battery drop off as I pull fuses.

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