[Mgs] Ignition light always on, low glow

[Hans Duinhoven]

Yes, looks like the diodes are becoming shot - or brushes.
What comes more risky:
after having this symptom first, the problem became worse and the diode pack 
created a leak when the engine was shut off and by this draining the battery 
empty.
As the battery was drained to 0 V and stayed like this for a long time, the 
battery was damged and to be replaced.
So I advise to swap the diode pack, before you get a flat battery at an 
unwanted moment.

Cheers,

Hans


----- Original Message ----- 
From: "oliver" <sumton at sbcglobal.net>
To: <mgs at autox.team.net>
Sent: Monday, September 10, 2007 4:26 PM
Subject: Re: [Mgs] Ignition light always on, low glow


> similar vein - sometimes my light goes on, generally at idle, then goes 
> away
> once i rev the engine or get going.  should i worry?
> ----- Original Message ----- 
> From: <palte at gmx.net>
> To: <mgs at autox.team.net>
> Sent: Monday, September 10, 2007 9:23 AM
> Subject: Re: [Mgs] Ignition light always on, low glow
>
>
>>> During the weekend the Ignition light on my 71 MGB GT has started
>>> showing a light glow all the time, at all engine speeds.
>>> Is it time for an Alternator rebuild?
>>>
>>
>> If the light is glowing only slightly, one of the diodes may have gone
>> and then the rectifier pack has to be replaced.
>> This is not really a DIY job, but then it is not that urgent.
>>
>> If the light stays on like it does when you have just switched on the
>> ignition, then it is most likely that the carbon brushes are shot (BTDT).
>>
>> They can be replaced easily and cheaply by yourself (BPF: $5)
>> (You need a 1/4"AF socket to remove various covers)