I'm replacing a bathroom light/fan. I pulled the old one and found it wired with 2 pieces of 12-2 w/gr, one for light and one for fan. At first, that was all I could see. I got continuity tester. All white wires were in contact, all ground wires in contact. So far, so good. Black wires not continuous. Had son operate switches. One switch connected one black wire to either ground, the other switch connected the other black wire to either ground.
Got to the junction box nearby in attic. Very tight, old fixture box that they've packed full, no fittings where wires pass through sides. I carefully mapped all connections and moved the whole setup into a large square box with bushings to protect my wires. Kind of hoped that, if there was a short, that I would find it or relieve it.
The only change I made to the original configuration was to run light and fan off 12-3 w/gr. Got it all hooked up, power still off, and tested. Sure enough, one switch connects my red wire to the ground, the other connects the black wire to the ground.
My son is disgusted that I don't just stick the fixture into the ceiling and be done. The house was built in 1960 and it "hasn't messed up yet." I am afraid to leave two switch connections that both seem to run through my bare ground wire.
The box had 3 "regular" connections, I guess "power in" and 2 lines out. There are 2 switch lines and there were 2 fixture lines. I've changed it to one fixture line with the 12-3.
Switches are wired properly, bl & wh to poles, w/ grounds connected to green screw on each switch.
There were small wood splinters in the box that were not scorched. They looked like construction debris.
Is this safe? If not, what do I need to do? Please help!!!!