Any help appreciated. My '77 is still charging at 17 volts. Just replaced the voltage regulator last week. Can't the rectifier overcharge the system? I've tried the trick where you jump battery to black at the voltage regulator...and it still is driving the voltage too high.
Thanks,
Ray
charging system redux
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- zipster
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- Location: Ferndale, Michigan
charging system redux
~Don't skin yer knuckles whatever you do.
1977 GL1000
1986 BMW K100RS flying brick
1975 Yamaha RD350
1978 Vespa P200e
1979 Lambretta Jet200
1986 Honda Helix
1977 GL1000
1986 BMW K100RS flying brick
1975 Yamaha RD350
1978 Vespa P200e
1979 Lambretta Jet200
1986 Honda Helix
- zipster
- Chrome Member
- Posts: 176
- Joined: Sat Jan 11, 2014 6:28 pm
- Location: Ferndale, Michigan
Re: charging system redux
Turns out my DVM battery was bad. Shame.
~Don't skin yer knuckles whatever you do.
1977 GL1000
1986 BMW K100RS flying brick
1975 Yamaha RD350
1978 Vespa P200e
1979 Lambretta Jet200
1986 Honda Helix
1977 GL1000
1986 BMW K100RS flying brick
1975 Yamaha RD350
1978 Vespa P200e
1979 Lambretta Jet200
1986 Honda Helix
- gregforesi
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Re: charging system redux
No fair solving your own problem with a simple fix.
Unusual for a battery to put out such a high voltage on its own though. I have to wonder if it went bad due to the overcharging.
The rectifier just cuts out the negative part of the voltage coming from the three phase AC stator so the answer to "does it affect charging voltage" is no. The voltage out of the rectifier is dependant on engine rpm and can (should) be as high as 25 volts (1/2 of the 50 volt AC max stator output). The regulator then knocks that down to 14.25 or so for the DC side of the system.
The caveat here is "...what Greg doesn't know about electricity fills libraries." - Dr. Hoppe PhD EE
Unusual for a battery to put out such a high voltage on its own though. I have to wonder if it went bad due to the overcharging.
The rectifier just cuts out the negative part of the voltage coming from the three phase AC stator so the answer to "does it affect charging voltage" is no. The voltage out of the rectifier is dependant on engine rpm and can (should) be as high as 25 volts (1/2 of the 50 volt AC max stator output). The regulator then knocks that down to 14.25 or so for the DC side of the system.
The caveat here is "...what Greg doesn't know about electricity fills libraries." - Dr. Hoppe PhD EE
2006 GL1800 (Brutus Maximus)
1978 GL1000 (White Trash - 2012 BOTY
(If you want to discuss the Trashmobile, Webers, Rearsets, Clubmans, or other stuff then send me a PM.)
"Getting old ain't for sissies" - Phyllis Diller
"So how much you gonna spend to win that $5 trophy?" - Cyborg
1978 GL1000 (White Trash - 2012 BOTY
(If you want to discuss the Trashmobile, Webers, Rearsets, Clubmans, or other stuff then send me a PM.)
"Getting old ain't for sissies" - Phyllis Diller
"So how much you gonna spend to win that $5 trophy?" - Cyborg
- zipster
- Chrome Member
- Posts: 176
- Joined: Sat Jan 11, 2014 6:28 pm
- Location: Ferndale, Michigan
Re: charging system redux
Yeah, when these digital volt meters go bad they read high. I'm presently chasing demons related to converting my turn signals to LED, so when they stopped working I assumed high voltage had burned them up.
~Don't skin yer knuckles whatever you do.
1977 GL1000
1986 BMW K100RS flying brick
1975 Yamaha RD350
1978 Vespa P200e
1979 Lambretta Jet200
1986 Honda Helix
1977 GL1000
1986 BMW K100RS flying brick
1975 Yamaha RD350
1978 Vespa P200e
1979 Lambretta Jet200
1986 Honda Helix
- gregforesi
- Honored Life Member
- Posts: 4966
- Joined: Wed Jun 10, 2009 8:42 pm
- My Album: http://www.ngwclub.com/gallery/v/wingmans/Greg+Foresi/
- Location: Venice, FL
Re: charging system redux
I just noticed the scooters in your signature. When you get a chance, post a picture of the Lambretta.
2006 GL1800 (Brutus Maximus)
1978 GL1000 (White Trash - 2012 BOTY
(If you want to discuss the Trashmobile, Webers, Rearsets, Clubmans, or other stuff then send me a PM.)
"Getting old ain't for sissies" - Phyllis Diller
"So how much you gonna spend to win that $5 trophy?" - Cyborg
1978 GL1000 (White Trash - 2012 BOTY
(If you want to discuss the Trashmobile, Webers, Rearsets, Clubmans, or other stuff then send me a PM.)
"Getting old ain't for sissies" - Phyllis Diller
"So how much you gonna spend to win that $5 trophy?" - Cyborg
- OhioBill
- Silver Member
- Posts: 931
- Joined: Sat Apr 02, 2005 9:56 pm
- My Album: http://www.ngwclub.com/gallery/v/wingmans/OhioBill
Re: charging system redux
I have a question along the same line. Sunday while coming off the highwway my digital voltmeter shot up to 17 volts. First time ever that high, normal is 14.6 . Return trip it stayed at 14.6. Is this a prelude to my regulator going bad? Glass mat battery.
OhioBill
I now have GPS so I no longer get lost, just confused.
Retired and Loving it.
When I die send my body to the scrap yard.
Two hips and a shoulder replaced.
1975 Blue/ Green (Now Black) My main ride
1975 Red Gone to my son! (Burned Feb 2013)
1979 Black (to be restored)
1979 Blue (Sold)
1978 Black (back in the fold) sold again. Bought it back, again
1993 blue 1500 Sold
1976 Restoring
I now have GPS so I no longer get lost, just confused.
Retired and Loving it.
When I die send my body to the scrap yard.
Two hips and a shoulder replaced.
1975 Blue/ Green (Now Black) My main ride
1975 Red Gone to my son! (Burned Feb 2013)
1979 Black (to be restored)
1979 Blue (Sold)
1978 Black (back in the fold) sold again. Bought it back, again
1993 blue 1500 Sold
1976 Restoring
- CYBORG
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- Joined: Mon Jan 14, 2008 12:52 pm
- Location: Muskegon mich
Re: charging system redux
17v for any length of time will fry the battery. I would check all my connections in the charging circuit for corrosion/ or loose connectors . Also the battery connections and frame ground
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
1977 custom with 1200 engine
1985 gl1200
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