Batt. and Oxy. light on until 2 1/2 rpms over,lights go away

kimichihotdog

Batt. and Oxy. light on until I rev. to 2 1/2 rpms then it goes away.
Maybe wiring?
Any idea's?

Bruce Wayne · Samba Member Joined: May 15, 2007 Posts: 1210

mine is the same. I think it takes up to 2500-2800 rpm's for the alternator to start charging the battery. or does it have something to do with the voltage reg? someone with more knowledge of these things should have a better answer.

vern-the-van · Samba Member Joined: August 11, 2007 Posts: 45

Not sure if this info is that useful to you but...
I am in an 81 cal. air cooled, and when I first start the engine my battery light will stay on until I gently touch the accelerator (to get to maybe 950rpm). After that the battery light goes out and stays out.

The age-old question. Are you grounds good and clean?

kevinbassplayer · Posted: Wed Jul 22, 2009 11:03 pm Post subject:

Seems to be real common, same deal in my 87'

jackbombay · Posted: Thu Jul 23, 2009 4:21 am Post subject:

tortuga · Posted: Thu Jul 23, 2009 5:46 am Post subject:

My '85 does it too . . .
_________________
1985 Westfalia 1.9 WBX

Turk.380 · Posted: Thu Jul 23, 2009 6:52 am Post subject:

it's nothing more serious than the fact that alternators need to be spun at a minmum RPM to "excite the field" and get it charging. once the field is excited the RPMs can drop off some and it will continue to charge.

sometimes when we start our engines, it revs up enough in the startup onit's own to get the alternator going... other times when we start it's a nice gentle start and it's not spun up enough to get that field going.

or at least that's what I learned in my first year of the Sally Struthers Engineerin' skool! Yesterday I couldn't even spell enjineer, now I are one! Shocked

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Brian W
St. Louis, MO
'64 SO-33 Hatch Top Westy | '87 Syncro Westy: Subaru EZ30D powered | 2002 VW Winnebago Vista

ValleyHappy · Posted: Thu Jul 23, 2009 7:06 am Post subject:

http://www.thesamba.com/vw/forum/viewtopic.php?t=282982&highlight=

See Dogpilots reply to the same ? awhile ago.
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09 Suzuki SX-4 Crossover

mightyart · Posted: Thu Jul 23, 2009 7:15 am Post subject:

How many of you have an aux battery relay?

McVanagon · Posted: Thu Jul 23, 2009 7:18 am Post subject:

I have had my '85 for 17 years, and it has never flickered at low rpms.

I picked up my '87 two years ago, and it just started doing it earlier this year. It's charging, but just off idle it flickers.

I now read that it's somewhat normal, but it still drives be up the @#$&ing wall.
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'69 Mike
'85 GL
'87 Wolfsburg Hardtop

Bruce Wayne · Samba Member Joined: May 15, 2007 Posts: 1210

McVanagon · Posted: Thu Jul 23, 2009 8:43 am Post subject:

ValleyHappy · Posted: Thu Jul 23, 2009 8:48 am Post subject:

I do not have an aux. battery relay, but I have not looked at the alt. regulator as Dogpilot mentioned to see if it solved this issue. Looks like a pretty inexpensive 'try'....if yours is replaceable.
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09 Suzuki SX-4 Crossover

kimichihotdog · Posted: Thu Jul 23, 2009 10:57 am Post subject:

Ok guys, tried troubleshooting the wiring and it's correct. Changed alternator within a month ago with a regulator. Also, batt. only 1 year old but I drained that batt. 4 times and recharged it. I'm going to try to recharge the batt. again and have it fully charged to see if the light will go away.
We'll see Shocked

tortuga · Posted: Thu Jul 23, 2009 11:19 am Post subject:

kimichihotdog · Posted: Fri Jul 24, 2009 8:54 am Post subject:

Got the results and it didn't work. Well, I guess I'll have to trace the wiring again to the alternator. Crying or Very sad

kimichihotdog · Posted: Fri Jul 24, 2009 12:47 pm Post subject:

IT'S Fixed!
Bad regulator.
The wire that holds the brushes in the alternator ripped.
So, I just fixed it.

Very Happy

kimichihotdog · Posted: Tue Jul 28, 2009 12:57 pm Post subject:

Back again and lights are off. Smile

Now, batt. can't crank Sad

, has voltage.
Recharging.
Thinking I may need a new batt.
May not have enough cranking amps.
You think.

ValleyHappy · Posted: Tue Jul 28, 2009 1:05 pm Post subject:

I have had a similar experience when a not so old battery just couldn't hold a charge. I don't know if it was just dropped in a strange way at some point or if it was just a factory defect. I replaced it with the same battery model and it has not been an issue since. Good luck.
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09 Suzuki SX-4 Crossover


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