If they tried to jump it cross connected, there would likely to have been
quite an eruption. It would serve as a direct short across the batteries.
As far as hurting the car, I doubt that anything would object. Battery
polarity doesn't effect anything other than the alternator and radio.
Actually, the coil is polarity sensitive as well but requires long term
running to cause any problems. If the car were to actually start things
could get interesting with the alternator. The starter doesn't care. It is
a series wound motor and will run the same direction reguardless of
polarity. It can only be reversed internally. I would suspect that the
battery just lost level through normal means (ie: age) or they overcharged
it and boiled it dry. Either way, sounds like a new battery is in order.
Best regards,
Fred Schroeder
Denison, TX
SRL311-13359
TDROC
Reg e-mail sitsinwest@texoma.net
Home page http://home.texoma.net/~sitsinwest
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