One of four outside light fixtures (all controlled by same switch) isn't working and it's not the (3) bulbs

Question

We have four outside light fixtures in the front of the house, all controlled by a single indoor switch. One of them has stopped working (so it can't be a circuit breaker issue).
It's not the bulbs, since they work in the other fixtures and the bulbs from the other fixtures do not work in the faulty fixture.
Does that mean the only thing it could be is the wiring for the faulty fixture?  There's no way all three sockets in the fixture went bad at the same time.

JACK · Answer

Check the voltage at the fixture that isn't working, it could be a bad connection there. If there is no voltage in that box, go to the next fixture box, which is working, and test for loose connections there that would affect the feed to the fixture not working. If there is voltage there and all connections are good, look for a break in the wiring between that fixture box and the fixture box not working.

Answered by JACK on April 8, 2021

One of four outside light fixtures (all controlled by same switch) isn't working and it's not the (3) bulbs

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