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> Overcharging battery 1972 1.7, Getting 16V at idle
MNnewbie
post Jul 14 2020, 10:07 AM
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Checked the voltage to the battery at idle and showed 16V. I now know why the new Bosch battery I bought only lasted 2 years until it was dry. Where is the voltage regulator located? Seems that is probably the first thing I should replace. Although I do have some random electrical quirks that might be ground related.
Turn signal stays on when key is off if engaged and one of the headlight has been cycling when I turn them off.
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VaccaRabite
post Jul 14 2020, 10:31 AM
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Voltage regulator is located across the engine bay from the battery on the relay board. Sounds like it needs replacement.

Zach
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FlacaProductions
post Jul 14 2020, 11:48 AM
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Turn signal staying on is correct and an intended feature. Often needed/required in europe when parking to make it easier to see.

re: headlight motor cycling - check these threads for a start:
http://www.914world.com/bbs2/index.php?sho...t+motor+cycling

You may also swap the headlight motor relays and see if the problem follows along.
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Maury4
post Jul 14 2020, 12:54 PM
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I had a1975 911 doing that. it would go to 18+ volts. After several VRs, I went and cleaned every ground I could find in the car. There are a bunch behind the dash. And that is what finally fixed it. Might try that first. I was amazed at what started working.

Rick Maury
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MNnewbie
post Jul 14 2020, 01:59 PM
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QUOTE(VaccaRabite @ Jul 14 2020, 08:31 AM) *

Voltage regulator is located across the engine bay from the battery on the relay board. Sounds like it needs replacement.

Zach

Thanks on both pieces of information. I think I will try Pelican for a new one.
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MNnewbie
post Jul 14 2020, 02:02 PM
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QUOTE(Maury4 @ Jul 14 2020, 10:54 AM) *

I had a1975 911 doing that. it would go to 18+ volts. After several VRs, I went and cleaned every ground I could find in the car. There are a bunch behind the dash. And that is what finally fixed it. Might try that first. I was amazed at what started working.

Rick Maury

Thanks, Rick, hoping cleaning up the grounds clears up the winking headlight also
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MNnewbie
post Jul 14 2020, 02:05 PM
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QUOTE(FlacaProductions @ Jul 14 2020, 09:48 AM) *

Turn signal staying on is correct and an intended feature. Often needed/required in europe when parking to make it easier to see.

re: headlight motor cycling - check these threads for a start:
http://www.914world.com/bbs2/index.php?sho...t+motor+cycling

You may also swap the headlight motor relays and see if the problem follows along.

Brian, thanks for jogging my memory regarding the turn signal. Once I get the charging issue resolved I plan on working on the headlight. Appreciate the link!
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porschetub
post Jul 14 2020, 02:57 PM
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QUOTE(MNnewbie @ Jul 15 2020, 07:59 AM) *

QUOTE(VaccaRabite @ Jul 14 2020, 08:31 AM) *

Voltage regulator is located across the engine bay from the battery on the relay board. Sounds like it needs replacement.

Zach

Thanks on both pieces of information. I think I will try Pelican for a new one.



Avoid buying the China made Hella one,they don't fit very well ...as me how I know.
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MNnewbie
post Jul 14 2020, 03:30 PM
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QUOTE(porschetub @ Jul 14 2020, 12:57 PM) *

QUOTE(MNnewbie @ Jul 15 2020, 07:59 AM) *

QUOTE(VaccaRabite @ Jul 14 2020, 08:31 AM) *

Voltage regulator is located across the engine bay from the battery on the relay board. Sounds like it needs replacement.

Zach

Thanks on both pieces of information. I think I will try Pelican for a new one.



Avoid buying the China made Hella one,they don't fit very well ...as me how I know.

Any recommendations on an alternate? Thats the only one they have currently
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FlacaProductions
post Jul 14 2020, 07:17 PM
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Is this one correct?
https://www.sunsetporscheparts.com/oem-part...nor-90160320603

I have one as a backup from Sunset but the p/n was:
901-603-206-02 - superseded? @porschetub

Not sure country of origin on mine...
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914Sixer
post Jul 15 2020, 06:41 AM
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Yes buy the one from Porsche. DO not mess with the aftermarkets. Your back up will work just fine.
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MNnewbie
post Jul 20 2020, 03:00 PM
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QUOTE(FlacaProductions @ Jul 14 2020, 05:17 PM) *

Is this one correct?
https://www.sunsetporscheparts.com/oem-part...nor-90160320603

I have one as a backup from Sunset but the p/n was:
901-603-206-02 - superseded? @porschetub

Not sure country of origin on mine...

Ended up with a Beru model-need a little modification to mount it but charging nicely around 14V now. Thanks again for everyone's feedback.
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