I haven't completed all the testing yet, but it appears I may have to replace this fixture.
I installed the light fixtures in my pool about nine years ago and have forgotten exactly how it was done. My concern is I used some "potting compound" in the back of the niche to seal a connection.
I am hoping it was the bonding wire connection and not the power cord from the fixture up to power. I can't remember.
Does anyone have any insight into this?