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Overcharged Battery

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Old 02-22-2012, 10:08 AM
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Overcharged Battery

Would of wise.... When putting the whole front end back together after replacing the steering bearings, remember to fully plug in all electrical.

After riding hard yesterday I found that my battery was getting overcharged. With the smell of sulfur and a high pitch tone coming from under the seat it got me worried. Well with further investigating I found that my Headlight came unplugged causing the current that should have been going to it, went right back into the battery? Nope wrong again...........

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Old 02-22-2012, 10:52 AM
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I am pretty sure you are diagnosing this wrong.

An uplugged headlight should not cause this, more likely your regulator/rectifier is failing. This component is meant to control current in the charging system.

Put a meter on your battery with the bike running and unplug the headlight and note differences. Same reason going to hi beam wont drain the battery, nor will turn signals.
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Old 02-22-2012, 11:02 AM
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Have to agree / truly Smokin' is correct.. Especailly if you have a 1998 to 2000 (earlier) S-hawk...
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Old 02-22-2012, 12:06 PM
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+ a million. Replace that R/R. Your battery should not rely on external draw to operate properly. If operating correctly, the charging system will work with everything unplugged from it.
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Old 02-22-2012, 12:07 PM
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lol, I was like uhhh guess I overcharged the **** out of my battery at the track day where I unplugged the headlight and brake lights.
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Old 02-22-2012, 01:45 PM
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Alright, I put a meter on it. At idle it rises above 15 and with RPM's at 2500 it shows 18+.... Bad R/R?
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Old 02-22-2012, 01:49 PM
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Is this the silly political season?

Yep, bad R/R. Gonna toast the battery.
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Old 02-22-2012, 02:39 PM
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OK, pulled the regulator and tested all top three prongs all test in the 40's. But the thing that I found is the plug for the regulator is melted on the top middle and right.....

Any Clues??????
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Old 02-22-2012, 03:37 PM
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Classic r/r failure. Replace with a MOSFET unit if you can. Very common on this bike. Looked something like this, but maybe more?

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Old 02-22-2012, 06:16 PM
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Thank you everyone. Yes my plug looked worst then that. Could not afford new unit, so for now I replaced it with heat resistant female connectors with silver solder on the ends of the wires. All numbers are in the norm.
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Old 02-22-2012, 06:20 PM
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So yeah its toast. Also go to eastern beaver and replace that whole plug cuz its also done.

So...........................DO A SEARCH

(hadda say it) for the R/R or regulator rectifier on this forum because there is hours of info on it.

You want to replace it with a mofset one (NOT a stock one). I used one from an R1 like a lot of guys but other options abound.

15-18 is obviously way too high
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