Kirk,
Start here (If you haven't already!):
http://www.tigersunited.com/resources/wsm/tt-images/MKIBIGwiring.jpg
The light connects 12v from the ignition switch through the lamp to the "D"
terminal on the voltage regulator.
>From the diagram it looks like the D connector on the voltage regulator is
connected to the output of the generator; the only other connection shown is
the Field connection in the generator. If that's so, the voltage regulator
may have welded a relay point; the battery charge is through the voltage
regulator.
The last time I saw this problem was in a 1949 Ford around 1958... (there
was no light; the VR had failed.)
I'm not sure why connecting the lamp would cause this problem...
Tom
' 67 Mark 2 (which, fortunately, doesn't have a generator...)
On Wed, Apr 27, 2011 at 8:20 PM, Kirk Smith <twotigers@verizon.net> wrote:
> The other day, I decided to finally get around to fixing my non-working
> ignition warning light. It's been in that condition for the 23 years I've
> owned this Tiger. During that time, I've had flawless performance from my
> generator. Even had a battery last 18 years in this car with only
> occasional driving!
>
>
>
> The bulb tested fine.tracing the wiring, I found it was cut clean about 3
> inches behind the light. I found the other ends hanging in the wiring.
> The
> wires were color code correct with the wiring diagram. This is probably
> when a bell should have gone off, but I went ahead and connected the wires
> and turned on the ignition. Turning the key on produced a red light.
> Started the car, still had a red light. Revved the motor, still had a red
> light (although somewhat dimmer). Darn thing never went out! After about
> a
> minute or so, I shut off the car and disconnected the wires.
>
>
>
> Upon re-starting the car, the ammeter showed a slight discharge. Revving
> the motor never budged the ammeter needle. Previous to connecting the
> ignition light, the ammeter would swing from slight discharge at idle to a
> positive charge condition while running at speeds above idle (as it
> should).
> I was hoping the ammeter had just taken a hit from the ignition light hook
> up , but shortly thereafter I developed a miss in the engine and cranking
> speed at start up was starting to slow. Apparently, the generator didn't
> take too kindly to the ignition light experiment. Now I know why the wires
> had been cut and left hanging there!
>
>
>
> I'm hoping those on the list with more electrical expertise than myself
> (and
> that would be most of you) might be able to shed some light on what
> happened, and if you think the generator is a goner.TIA!
>
>
>
> Kirk
>
> B382000503
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