why do Pos term on side post battery fail first?

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Why do most posts about GM side terminal batteries complain about the positive cable. They always say my positive terminal is corroded etc, they never seem to mention the ground. My moms 98 buick about every 3 years has a positive cable problem and we have never touched the ground cable- any reason why the positive fails first (if they do)???
 
Positive battery posts and terminals collect the most crud/corrosion. This is why the penny [on top post batteries] should be placed near there.
It is because of the electron flow - the inherent way it is. Any moisture or crud on the battery top can make this happen at a faster rate.
 
Originally Posted By: mechtech2
Positive battery posts and terminals collect the most crud/corrosion. This is why the penny [on top post batteries] should be placed near there.
It is because of the electron flow - the inherent way it is. Any moisture or crud on the battery top can make this happen at a faster rate.


what about a penny?
 
Hmmm .... the negative terminal on my top post battery corroded; the positive one was fine. Replaced the battery and sprayed CRC terminal protector on them.
 
I have yet to have issues with corrosion on a side terminal battery.
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IIRC, when GM went to the side terminals, one of the selling points was "no" corrosion.

The problem I have with them is occasionally stripping the terminal threads.
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Hey Ed

My Honda did the same thing....a build-up of junk on the positive terminal...my solution was to clean em up, real goood and spray paint (inside & outside) them with copper paint, been three years and so far so good .. no build up at all.
 
A penny?
This goes back to day one -a very old trick.
Corrosion will aggregate on the penny, instead of the terminals.
Just lay one or two on the battery top, near the posts

BTW - Sure , neg posts/connectors will corrode and get build up, but it's the positive ones that are the worst.
 
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