A real common problem if you live in a road salt state is lack of a good ground on the tank. Use a good, reliable body ground for your voltmeter, then with the positive probe, scratch a good connection on the tank. If you find voltage there, drill a hole in the flange by the seam and run a self-tapping screw in there for a new ground wire. Be sure the hole is well outside the weld.
Tuesday, March 2nd, 2010 AT 6:12 AM