On Thu, 05 Jul 2007 16:31:17 -0700, JR North
wrote:

If the voltage did not rise immediately on start to at least
+13V, the charging system is not working.

Most likely the alternator/voltage regulator, usually the same unit
these days. Many NAPA auto parts stores can test it for you,
otherwise find a good local alternator shop. Most alternators can be
rebuilt for a reasonable price.