Anything below 13.1 or so volts is too low. Its not putting out what it
needs to. The problem is why is it not charging properly and why is the
battery light staying on with the key off, and going out when the key is
turned on before engine is started. That is the question.
[EMAIL PROTECTED] wrote:
Normal charging voltage is usually between 12 and 14 volts, depending on the load on the battery. You don't really need the alternator to push to much voltage since all it is really doing is keeping the battery topped off. To much will cause it to overheat and boil over. If you are getting 12.2 volts out is that without a load ? No accessories running ? You won't get much more than that unless you put a load on the alternator. Try putting a load on the system by turning on accessories, wipers, fan, radio, lights and see what happens.
69 280 SEL 120,000 Miles
72 350SL 108,000 Miles
2004 VW Passat 4 Motion
1999 Mazda Miata
-----Original Message-----
From: Kaleb C. Striplin <[EMAIL PROTECTED]>
To: Mercedes mailing list <[EMAIL PROTECTED]>
Sent: Mon, 14 Nov 2005 13:53:14 -0600
Subject: Re: [MBZ] screwed up 560SEL charging system
12.2 is not enough, it needs to be over 13.1 at the minimum, should
normally run 13.3 to 13.5 though.
Levi Smith wrote:
Uhh, unless I'm missing something, 12.2 isn't really enough. I would only
expect to see that if maybe you're overloading the alternator at idle.
Batteries should be at 13.2v or higher.
Levi
On 11/14/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Kaleb, its not just the volts that the alternator should be putting out (
12.2 sounds ok) its the amps thats needed for keeping the battery charged.
Have you checked all your grounds ? A bad ground could cause those symptoms
since you said putting in a new battery worked, but the red battery light
stays lit. That sounds to me like a weak ground on the battery side..
69 280 SEL 120,000 Miles
72 350SL 108,000 Miles
2004 VW Passat 4 Motion
1999 Mazda Miata
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Kaleb C. Striplin/Claremore, OK
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