Ok I have a room downstairs that has two light fixtures that operate off of two switches one on one side of the room when you come in you can turn lights on and one on other side of room you can turn lights off. Now the breaker or circuit these lights are on have other receptacles and lights on it as well. Okay so last week I bought a ceiling fan and put it up in place of one of the light fixtures. Was very simple took old fixture down put up the handy ceiling fan brace & box between joists then hooked black to black white to white and then bare copper wire to green wire on fan. So this was a week ago today now nothing on this circuit will work! Every switch has power to it outlets have power but if you plug something into outlet nothing!! When I plug Klein Tools RT100 outlet circuit tester into outlet it lights up to indicate hot/ground reverse??!! Now the house is about 46 years old and that’s how old wiring is as well. Now I’ve already checked every box on this circuit and there are no white wires out of place actually there’s nothing out of place because the only thing I done was exactly what I explained above and as I said everything was working fine up until this morning! Can someone please help me with this!! Thank you

I have a room downstairs with two light fixtures that operate off of a pair of 3-way switches on opposite sides of the room. The breaker these lights are on has other receptacles and lights on it as well.

Last week I bought a ceiling fan and put it up in place of one of the light fixtures. It was very simple - I took the old fixture down put up the handy ceiling fan brace & box between joists then hooked black to black white to white and then bare copper wire to green wire on fan.

This was a week ago today and now nothing on this circuit will work! Every switch has power to it and outlets have power but if you plug something into outlet, nothing!! When I plug Klein Tools RT100 outlet circuit tester into outlet it lights up to indicate hot/ground reverse??!! The house is about 46 years old and that’s how old wiring is as well. I've already checked every box on this circuit and there are no white wires out of place. Actually there’s nothing out of place because the only thing I done was exactly what I explained above and as I said everything was working fine up until this morning! 

Can someone please help me with this!! Thank you.