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Battery Switch

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crunch
Join Date: Jan 2007
Posts: 271 Niagara County, NY
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2007-05-19          142233

If I install a battery switch does it matter if I put the switch on the negative line? It just turns out that this would be more convenient for me on my boat. I am losing some juice and I thought the easiest solution would be to switch the battery off when I am not using the boat.

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hardwood
Join Date: Dec 2002
Posts: 3583 iowa
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2007-05-19          142237

Crunch; It shouldn't make a bit of difference, long as a curcit is broken it really don't matter which side of the battery you do it on. Frank. ....

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earthwrks
Join Date: Dec 2003
Posts: 3853 Home Office in Flat Rock, Michigan
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2007-05-19          142238

For your purpose, it doesn't matter which terminal.

However, for grins-and-giggles, a Ford electrical engineer I worked with told me he headed a study of the effects of welding on vehicles. They found that even with the positive lead disconnected, "ground waves" from the welding could pass through the negative of anything electronic. Funny though, shops weld on mufflers all day long without no perceptible ill effects as he agreed. His advice was to place the ground lead of the welder as close to the weld area as possible to lessen stray ground waves, and thus damage to electronic components. ....

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crunch
Join Date: Jan 2007
Posts: 271 Niagara County, NY
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2007-05-20          142243

Thanks Frank and EW. ....

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SG8NUC
Join Date: Jan 2006
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2007-05-21          142307

If you are losing juice, it will still drain the battery if the drain is before the switch you install. If I am correct the drain is going to ground somehow. Just an Idea. ....

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earthwrks
Join Date: Dec 2003
Posts: 3853 Home Office in Flat Rock, Michigan
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2007-05-21          142310

SG: Good point (not the one on your head LOL). Another point is a wet (electrolyte bouncing out from use) top of the battery between the terminals will also drain the battery. Then there's the bad-from-the-get-go battery like I had on the dump truck. It was a Motorcraft battery--the $100 one. I had three years. It was 4-year free replacement. Turns out it had a bad internal connection and wouldn't even show it continuity. Went top exchnage it for a new one and the new ones only had a one-year replacement. That's an indicator that the company doesn't believe it will hold up after a year. Oh yeah and it's still a $100. So I changed brands and saved $15. ....

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SG8NUC
Join Date: Jan 2006
Posts: 579 g
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2007-05-22          142365

EW,

You are still the smartest man I know. Until the smartest man shows up. ....

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