I removed an old light fixture (I believe original to the 1940 home) to find 3 black wires and 3 white wires. I didn’t pay attention to how they were wired to the light fixture before removing. I didn’t realize how many there were or that it was a switch loop. I believe the power source white and black are the ones in fabric, as they look older and mimic the other wiring I’ve found in the house. The fabric black wire is connected with another black wire. The third black wire is standing alone. The fabric white wire is standing alone, while the two newer-looking white wires are connected.
I’ve tried a lot of combos to try to get it working. The only one that has worked so far was when I hooked the black of the light fixture to the 2 already connected black wires and the white of the light fixture to the 2 already connected white wires. However, the fixture stayed on and did not turn off with the light switch. Any information is super helpful!