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'84 R80/RT


wbeckwith

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wbeckwith

Hooked up battery charger backwards on '84 R80/RT BMW. Will blame it on low light , hospital stay & stupidity. Turned on key; guages all went wild, pegged out then entire electrical died. Something blew, what? thanks in advance for any help.

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Michaelr11

If you're really lucky you might just have to replace fuses. Much more likely that you fried the diode board, possibly the ICU module too.

 

For future use, wire up an SAE connector for a Battery Tender (or other brand of smart charger). With the SAE connector you can't connect the charger to the wrong terminal. Even so, if you use a smart charger, most of them have polarity protection and they won't send out voltage if you connect them backwards.

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wbeckwith

Oak gets the prize! new battery & cranked right up! Amp meter showing 13 volts! seems to be ok!

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