Flickering Lights

It's probably a little late for this post, but for future reference for
someone... I had the same problem with my SC1, had it in for the altenator
check everything and finally gave up with trying to get the problem solved
under warranty. The problem with mine was the grounds, especially the
ground connection on the battery. It first off wasn't tight enough, and
the rubber boot around the side post (on the cable) was restricting the
cable end to make contact with the battery post. Simple fix was to use a
razor blade to trim the extra material away from the boot (I actually just
removed mine altogether). After that a second ground strap from the motor
to the chassis (I used a second mounting point on the motor and a second
bolt location on the chassis, cleaning the area to the bare metal). Also
a second ground strap from the battery to the chassis. After checking
these connections for continuity (using a multimeter) I cleaned all the
easy to get at grounds (there was a ground terminal on the left side of
the chassis behind the left headlight). And finally once that was done I
sprayed all of these connections, except the battery ground, with some
black spray paint to slow down corrosion. This eliminated the flickering
and seemed to remove some strain from the altenator, giving the car a
little more pep. Hope this helps!