The 3-prong outlets on one circuit in the kitchen show an open ground when tested with a standard circuit tester. When I test with a neon bulb, the ground-to-hot of all outlets on the circuit gives a weak glow (properly wired outlets show a strong light). Polarity of all outlets appears to be proper, all wires not connected to the outlets themselves have been twisted together and capped.

House dates from the early 1970s, but much of the electrical work in the kitchen appears to date from much later, though it was not particularly well done. No other circuit in the house seems to have this ground problem.

Any advice on troubleshooting and correcting would be appreciated.