taped threads, no washer.
did you check that it's screwed in quite tightly ?

----- Original Message -----
From: "William Greenamyer" <greenamyer@YAHOO.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, October 14, 2009 7:12 AM
Subject: Brake light switch on brake master cylinder

> It looks like I have a leak from one of the brake light switches on the
> master cylinder.  For those who have had this in the past, is the leak
> typically caused by a washer or "O" ring or is it just a bad switch?
>
> William