28-11-13, 09:03 PM
I had a similiar issues and I discovered that the pick up plug under the tank had some corrosion in it and a quick spray of WD40 fixed it. Had me baffled for a while as everthing was testing fine.
I then took all the connectors apart and treated them to the same dose of WD40 as a safeguard
I then took all the connectors apart and treated them to the same dose of WD40 as a safeguard