09-04-15, 10:50 PM
The contacts had a slight tarnish on them and also felt quite loose, so I tightened the troublesome ones and gave them all a good spray of wd40 to keep corrosion at bay. Looks like maybe I should give all the connections abit of a nip with some pliers, once the tank is off AGAIN it will only take 5min. Anyway thanks for your comments.
Andy
Andy