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Fw: Ignition Light Default

To: "Ciaccio Family" <>, "MG Digest" <>
Subject: Fw: Ignition Light Default
From: "Paul Hunt" <>
Date: Thu, 30 Dec 1999 09:34:04 -0000
I omitted to say that the ignition should be on but the engine stationary
for these tests.


----- Original Message -----
From: Paul Hunt <>
To: Ciaccio Family <>; MG Digest <>
Sent: Wednesday, December 29, 1999 4:01 PM
Subject: Re: Ignition Light Default

> Remove the plug from the alternator and connect a test-lamp to the
> brown/yellow.  Its other side should be connected to ground.  With the
> lamp connected like this both the test lamp bulb and the warning light
> should be glowing at about half-brilliance (depending on the relative
> wattages of the bulbs, the lower-wattage bulb will glow brighter).
> If they are glowing then the fault is inside the alternator.  If neither
> glowing then move the test-lamp to the warning light holder (bulb in
> and try there on the brown/yellow then on the white (only the test-lamp
> should glow here, at full brilliance).  If it still doesn't glow than move
> back towards the ignition switch on the white.
> Remember that a voltmeter is quite capable of showing the presence of 12v
> a wire that has a high-resistance fault, whereas when you connect a
> low-resistance load such as a bulb the 12v will vanish.
> PaulH.
> ----- Original Message -----
> From: Ciaccio Family <>
> To: MG Digest <>
> Sent: Monday, December 27, 1999 12:07 AM
> Subject: Ignition Light Default
> > Ok guys.  The ignition warning light on my '76 B is not working.  I have
> > 12v to the light itself via the white wire.  The brown/yellow wire goes
> > back to the alternator negative side.  I cleaned the contacts.  Turn on
> > the key and still the light does not come on (yes the bulb is ok).  Any
> > ideas out there?
> >
> > Thanks.
> >
> > Dave Ciaccio
> > '76MGB
> >
> >

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