Robins request got me off the dime, so I searched the archives and I 
have linked two revelant posts to the Syncro Westie page at 
http://pwp.usa.pipeline.com/~tforhan/swhome.htm/

The first one is a comprehensive list of steps to take and things
to check, the second is my (not necessarily universally accepted) 
approach.

If anyone knows of a single comprehensive piece that better answers 
these questions, let me know and I will adjust the links. 

Tom F.
90 Syncro Westie