Lighting, Light Fixtures, Ceiling and Exhaust Fans - Light fixture replacing fan/light

I'm installing a light fixture where a ceiling fan with light, controlled by a 3-way switch, was previously. From the ceiling box I have the white, black, red and ground wires. From the fixture there's what I call lamp wire--with one wire smooth and the other ribbed-- plus the ground wire.

Following the fixture instructions the ribbed ("common lead") side is connected to the white supply wire; the smooth edged wire ("power lead") is connected to the black supply wire; and the ground wire of the ceiling box is connected to the green screw and then to the ground wire of the fixture. There is no instruction for wiring to 3-way switch, which I assume uses the red wire?

Connected as instructed (capped the red wire) the fixture can be controlled by one switch only. To get both wall switches working, do I connect the black wire of the fixture to both the black and red of the ceiling box? Or just to the red wire, leaving the black supply wire capped?

Thanks for your help.

Was the fan/light combo controlled by two switches, one for the fan and one for the light. That is the common usage. The black wire will go to the fan and the red to the light. When you disassembled the fan light, where was the red wire attached?

The obvious question is, how wer the light and fan connected to these same wires?

With only three wires (plus ground) present at the ceiling, the three way switches do not enter the picture at all.

The obvious question is, how wer the light and fan connected to these same wires?

With only three wires (plus ground) present at the ceiling, the three way switches do not enter the picture at all.

The fan/light fixture was controlled on one side of the room by one switch for the light and one for the fan. The light was controlled from the other side of the room also, by one switch (none for the fan on that side of the room).

What I want to do now is continue to control the light from either side of the room. I don't know how the wires were connected before, since I didn't remove the light/fan.

Did you use your tester to test the wires?

The obvious combination to investigate is to test the red wire to see if it switched by the three way switches.

Tell us ALL the wiring at the ceiling and at all the switches. Be as specific as possible. If you aren't specific enough, we'll just send you back to do it again.

We need to know what cables or conduits are present; what wires are in those cables or conduits; and how those wires are connected to anything.

Did you use your tester to test the wires?

If I had a tester and knew anything about using it I wouldn't be here asking for help!

As I said before, all the wires present at the ceiling box were 1 each of white, black, red and ground. Previously I had used the black wire and got function at only one of the swithces. I tried again using the red wire and capping the black--the light works as intended from all switches (in fact, we discovered the light is operated by a third switch also).

Thanks for the responses anyway.

You should NOT be doing electrical work without a tester.

You would have found this out with a tester, or by opening the switch boxes and examining the wiring.