Peter,
from past experience with other british cars, I can offer two possibilities.
1 -- the voltage stabilizer - behind he dash - may have a short in it, and
2, -- where I put my (imaginary) money is the rectifiers and regulator
within the alternator has a problem. The 3-4 second cycle time you mentioned
is probably about right for a short or loose connector in the alt to cycle
thru it's failure/recovery mode. May be all wet here, but figure it's a
starting point for you
Ken
73 '6
> I finally got a chance to fire up the 250 this afternoon. Spent most of
the
> winter doing some brake work.
>
> Anyway, no problem starting and she idled like a champ. There is an issue
> that I'd like some help with.
>
> Every 3-4 seconds, the ign light comes on then goes off. At the same time,
> the amp gauge lurches to the left. I'm not sure what is going on.
>
> As background, I have a new alternator (less than 500 miles), a new
battery
> (less than 2 years old and trickle charged over the winter), the battery
> posts are spotless, and the wiring harness in the car is only 3 years old.
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