I omitted to say that the ignition should be on but the engine stationary
for these tests.
PaulH.
----- Original Message -----
From: Paul Hunt <paul.hunt1@virgin.net>
To: Ciaccio Family <hearts@radiks.net>; MG Digest <mgs@autox.team.net>
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
test
> 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
are
> glowing then move the test-lamp to the warning light holder (bulb in
place)
> 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
on
> 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 <hearts@radiks.net>
> To: MG Digest <mgs@autox.team.net>
> 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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