I'm trying to install a replacement hall light and the box has 3 black, 3 white wires and no apparent ground wire, it is connected to a 3 pole switch. My fixture only has a black, white and a ground, once I disconnected the fixture in the hall the bathroom light went out as well, long story short I forgot how to reconnect it as I got called away for something else. But there were two black connected to one white , which is rather odd, then two whites that went to one connection on the light and one black to the other if any of that helps. I am trying to figure out out which two blacks go to that one white and white two whites go to the light. I blew the fuse several times trying to figure it out and one time the light came on but would not shut off.
It's not odd that a white connects to the blacks. That's the feed for a switch loop. The black that's in the cable with that white is probably the fixture's hot supply. Once you have that identified it's pretty simple.
- White from the switch connects to the two blacks that aren't in the same cable as that white
- The other whites get bundled with each other and the fixture white
- Black that pairs with the switch white connects to the fixture black
- Fixture ground gets ignored if there's no ground at the box