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odd electrical spark

posted by  Bryan.C on  Fri Feb 6 05:27 CST 2009
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last visit: Sat Oct 18 19:41 CST 2014
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I was getting ready to hook up my battery charger to an '89 240 that has an intermittent dead battery problem (that I haven't had a chance to troubleshoot) and something that seems impossible occured: I took the positive cable off of the post and the clamp touched the metal cover of the high/low headlight relay with a small spark.

Is that some kind of clue as to what is causing a brand new battery to discharge?

I'm confused. What would hold a charge like that???

The ground cable was still connected to the battery post but the positive cable was removed; i.e., an open circuit... but when the cable touched the bare metal it sparked like the battery was still connected, and, it was not.






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