Hi Sam,

    A way to prevent the corrosion you speak of is to put a small amount of
"Die-electric" (check spelling) grease on it. Just clean the contact with a
brass brush and apply the grease.
    You can find it at any good FLAPS or Radio Shack. A small tube is only a
couple bucks, and will last years. Also works good on battery terminals, or
almost any connection you want to stay clean.
    Don't forget the grounds on those lights! A dab of the grease here too.

Howard

> Several people on the list have pointed out that you can get a big boost
> in brightness if you simply clean up the contacts going to the tail,
> brake, and turn light sockets.  About 20 years of use has created some
> corrosion and that will rob the circuit of the power needed to get the
> light up to its stock level of brightness.