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Re: [Mgs] Alternator? problems

To: mgs@autox.team.net
Subject: Re: [Mgs] Alternator? problems
From: "P. Chast" <pchastnow@gmail.com>
Date: Mon, 26 Aug 2013 23:48:41 -0400
Delivered-to: mharc@autox.team.net
Delivered-to: mgs@autox.team.net
References: <CAEUYfyOQR5sORgbNEL43Tv254p9E8RA8CYPr+K+62JmdVmKWxA@mail.gmail.com>
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Bad Belts?

On Mon, 26 Aug 2013 23:42:58 -0400, Simon Matthews  
<simon.d.matthews@gmail.com> wrote:

> We have a '71 MGB which is having charging problems, I think. The  
> ignition
> (red) light on the dashboard only goes out (well, it goes very dim) when
> cruising on the freeway.
>
> Is there anything other than the alternator that I should be looking at?
> The battery seems to be holding its charge (and I just put in a new  
> battery
> due to a misunderstanding).
>
> The alternator appears to have 5 terminals, but only 3 connected. It  
> looks
> like the picture in this pdf file:
> http://www.mossmotors.com/graphics/products/PDF/130-100.pdf
>
> The Moss replacement describes connecting only 2 terminals (see this  
> note:
> http://www.mossmotors.com/graphics/products/PDF/540-280.pdf) , so I am a
> little confused about what I have. It looks like 2 of the terminals are
> both connected with heavy gauge brown wire, so it would not be  
> unreasonable
> to assume a PO has made a redundant connection.
>
> If it is the alternator, should I just replace the whole thing or is  
> there
> a likelihood that the diode pack or brushes have failed? As I mentioned,  
> it
> does appear that we are getting some current out of it -- unless there is
> some other mechanism that could cause the ignition light to be on?
>
> Simon
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