Grounded or not grounded?

[Denray]

Same house. Sometimes my jippo tester barely shows a light on the far right, yet at other outlets its bright. Sometimes the far right is completely out. What's that all about?

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[John Kogel]

Faulty ground.

What is actually faulty could be anything from corrosion in the wiring to bad contacts at the tester. You should carry more than one of those flaky testers.

[rkenney]

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For a 110v circuit to show this result you have a hot/neutral reversed and an open ground. It may seem implausible since an open ground by itself gets only one yellow light but that is what got the result when i switched wires on an outlet to test.

A 110 outlet wired for 240v also gets that result.

Best course is to have a fallback tester, ie - multimeter or wiggy and check your results.

[Denray]

I do carry a backup. Those two photos are in the same house. I went back and forth twice to be sure the tester was not at fault. Two or three outlets had that weak right light. Mfg home.

Thanks everyone.