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DSVW Samba Member
Joined: June 05, 2010 Posts: 296 Location: Maryland
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Posted: Mon May 12, 2025 7:20 pm Post subject: red gen light on |
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Hi,
I have a 1966 bug, 1300 all stock and still running the 6-volt system.
When my car is on and idling, I read 6.6 V at the voltage regulator.
With the car idling and all of the lights and high beams on it reads 6.2 V.
I noticed tonight when I was driving 45 mph with the lights on, the red gen light came on, the red gen light was very dim.
When I came to a stop sign, the red gen light went out even when I put the high beams on.
Any idea what this could be?
Battery, starter, and all ignition components except for the coil, are new. |
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Cusser Samba Member

Joined: October 02, 2006 Posts: 33131 Location: Hot Arizona
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DSVW Samba Member
Joined: June 05, 2010 Posts: 296 Location: Maryland
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Posted: Tue May 13, 2025 6:54 am Post subject: Re: red gen light on |
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When I measure the voltage at the battery with the car faster than idling (that is when the red light comes on), it measures around 7.2
I took some time this morning and cleaned up all of the connections at the regulator and generator. I also noticed that someone added a hard start relay so I cleaned up everything there and all of the grounds that I could find.
The red light is now fainter, but it still comes on when idling faster, goes away at idle. |
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Cusser Samba Member

Joined: October 02, 2006 Posts: 33131 Location: Hot Arizona
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Posted: Tue May 13, 2025 11:08 am Post subject: Re: red gen light on |
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DSVW wrote: |
I took some time this morning and cleaned up all of the connections at the regulator and generator. I also noticed that someone added a hard start relay so I cleaned up everything there and all of the grounds that I could find. |
Good idea
DSVW wrote: |
When I measure the voltage at the battery with the car faster than idling (that is when the red light comes on), it measures around 7.2
The red light is now fainter, but it still comes on when idling faster, goes away at idle. |
Sounds good to me !!! You're "there" ! Good job. _________________ 1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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gt1953 Samba Member

Joined: May 08, 2002 Posts: 13948 Location: White Mountains Arizona
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Posted: Tue May 13, 2025 1:28 pm Post subject: Re: red gen light on |
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If you take the time you can clean up every electrical connection and the lights will be brighter. takes time but benefits are worht it. _________________ Volkswagen: We tune what we drive.
Numbers Matching VW's are getting harder to find. Source out the most Stock vehicle and keep that way. You will be glad you did.
72 type 1
72 Squareback
({59 Euro bug, 62, 63, 67, 68, 69, 73 type ones 68 & 69 type two, 68 Ghia all sold}) |
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Eric&Barb Samba Member

Joined: September 19, 2004 Posts: 26027 Location: Olympia Wash Rinse & Repeat
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