- 1). Turn off the power to the bathroom at the fuse or breaker box.
- 2). Remove the existing fixture, unscrewing it from the electrical box and disconnecting the wires behind it. Use your wire cutters to clip off the ends of the wires coming out of the electrical box. Strip 1/3-inch of insulation off the ends so you have a clean starting point for rewiring.
- 3). Hold the new fixture up to the electrical box and wire it in the same configuration as the previous one was wired, connecting like-colored wires from the box and the fixture, screwing them together with the wire nuts. Generally you'll have one black and one white wire coming from each direction.
- 4). Tape the open bottom portions of the nuts with electrician's tape to seal them. Bend the bare copper ground wire from the box around the green ground screw on the fixture and tighten the screw.
- 5). Tuck the wires up into the electrical box, making sure the two wire nuts aren't directly next to each other. Hold the fixture in place while tightening the screws that came with it, threading them into the standard screw holes in the electrical box.
- 6). Put in a bulb, turn on the power and test your light.
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