Re: [diesel_mercedes] Re: Gremlin Hunt in 83 300SD

 

It's two possible causes.
You may not have to pull all the fuses again to test the regulator.
But you had a good test setup with the light in the ground path of the battery.
An ammeter is even better because if it is a light it will shine full brightness with an ammeter. Those little red meters from Harbor Freight are not bad for the money. $3 or $4 and throw them away when they break or need a battery.
But it's an easy test. Put it in the ground path of the battery like you did with the light and put it on the 10 amp setting first and see if pulling the alternator plug makes a difference. Try it first without pulling the fuses.
Bogy.


--- On Tue, 11/8/11, CaitlinDean <tinymachine@gmail.com> wrote:

From: CaitlinDean <tinymachine@gmail.com>
Subject: [diesel_mercedes] Re: Gremlin Hunt in 83 300SD
To: diesel_mercedes@yahoogroups.com
Date: Tuesday, November 8, 2011, 9:10 PM

Is this the "voltage regulator" I've been reading about?

And would this have anything to do with the light that stays on? Or am I looking at two possible causes?

Thanks, Bogy!
Caitlin in Santa Fe

--- In diesel_mercedes@yahoogroups.com, Bogy Wan Kenobi <polespearbogy@...> wrote:
>
> Caitliin:
>
> Nate is right. A faulty regulator on the alternator will drain the battery because the regulator is always connected to the battery. It goes through a diode but those can fail and start draining your battery. There is a plug on the alternator that is a pain to get from above but is easy from below. It has a clip on it you will need to deal with. Go easy with it. If the light goes out then it's the alternator. This is the best test I can think of for proving the alternator is the cause.
>
> Keep us informed.
> Bogy.
>

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