Sunday, March 23, 2008

Reversed polarity

A couple of weeks ago, I turned on the key (81 6-volt Passport), and I have dash lights but the starter wouldn't crank. This is typical after the bike sits a while. So I kick start it, it runs great and I ride around for about 2 hours, thinking that I'm doing the battery some good.

The bike sits for a couple of weeks again until today, I turn on the key and I have NO dash lights. I don't want to start it and blow out bulbs with a dead battery, so I immediately remove the battery and hook it up to a meter which shows zero volts/amps. The electrolyte level is good. I figure the battery is probably shot, but with nothing to lose, I hook the leads up to my wall-wart trickle charger, and while looking for an outlet to plug it in, I notice the charger getting really warm really quickly and look down and see smoke coming out of the little charger, and by now it's really hot! So I disconnect it, but now I'm wondering where it got enough energy from the battery to do such a thing.

So, I hook up the meter again, and it still shows zero volts/amps. So I reverse the connectors, hooking negative to positive, etc., and now the battery shows fully charged, and tests good except for the polarity being reversed.

What caused this? I assume that both the battery and charger are trash, but I'm wondering what I might have done to cause this.

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