Trumpy and Tesla--well thought out comments. Moisture and bad cable is no good. And the TDR is a great tool (available from specialty rental agencies for much less money than replacing well thumped cable).
Merlin-good luck on your quest! This site is amazing for it's wealth of experience and ideas-each electrician has many different problems, solutions and experiences to share. What a powerful tool to help get the job done. Many thanks to those who have both organized this web site and also act as moderators.
