Thanks to all for your input. I just checked a few more things.
Battery takes a charge with charger.
Car starts with good battery.
Light goes off when car starts.
Light comes on when car is shut off.
Voltage at battery cables with car running and unhooked from battery is
11.1 at idle to 12.2 when revved up with no lights or fans on.
Other facts: Light goes out when I disconnect the alternator.
I put a new Regulator in about a month ago.
Thanks again for any other thoughts.
Mike in Michigan
----- Original Message -----
From: "Hans Neureiter" <[EMAIL PROTECTED]>
To: "Mercedes Discussion List" <[email protected]>
Sent: Wednesday, December 06, 2006 3:56 PM
Subject: Re: [MBZ] Red dash light for Battery is staying on
i suspect the electrical part in your ignition switch. There may be some
ice
inside so the swith doesn't work.
The charging light gets fed 12V from the switch to one side and ground (I
wire) through the field windings on the other. Key on - the lamp lights.
When the Alternator is producing output, the windings become forward 12V
and the light goes ot since the lamp now has 12V at both sides. On a swith
that doesn't work, with the key on or off the light stays where the
switch
failed. With the car running and the alternator 'alternatering', the light
will go off, irregardless of the swith.
On 12/5/06, MICHAEL ESH <[EMAIL PROTECTED]> wrote:
I just went out to start my 1981 300sd and the battery was stone cold
dead. It started fine two days ago. I put a charger on and walked out 15
minutes ago and red battery indicator light is on. It stays on with key
in
the off or on position. In addition the glow light did not come on when
I
tried starting it. It is about 20 digress F out there tonight. I did
not
start. I am going out to try it again.....Any ideas?
Thanks,
Mike in Michigan
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--
Hans Neureiter, Houston, TX
'82 300SD, '95 E300D
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