Bathroom Light Switch Wiring Diagrams

By Dave Rongey - Summary:

Installing Electrical Wiring for a Bathroom Light Switch with the help of Wiring Diagrams…

How to Wire a Bathroom Light Switch

Home Electrical: I’m replacing a light fixture in a bathroom.

  1. The bathroom also includes an exhaust fan, no light, two separate switches for light and exhaust fan.
  2. The connections from light to box are black to red wire, white to white wire, ground to green wire.
  3. There are also two cream wires coming out of box that I assume are for the fan.
  4. Do they connect to the hot wires red/black or to each other to complete the circuit?

This electrical question came from: Trudy, a Homeowner from Vernon Hills, Illinois.
See more about Home Wiring for Illinois

Dave’s Reply:
Thanks for your home electrical question Trudy.

Electrical Wiring for a Bathroom Light Switch with Wiring Diagrams

  • Trudy the cream color wires should be verified, however each function for a light or exhaust fan will require a hot, neutral and ground wire to be connected to a voltage source and through the wall switch.
  • Once the power source has been verified then the connections should be clear.

The Following will assist you with your Bathroom Light Switch:

Wiring Diagrams for Light Switches

  • Electrical Wiring Diagrams

  • Home electrical wiring diagrams are an important tool for completing your electrical projects. An electrical wiring diagram can be as simple as a diagram showing how to install a new switch in your hallway, or as complex as the complete electrical blueprint for your new home or home improvement project.

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Wiring Diagrams Directory

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Wiring Bathroom Exhaust Fans

  • Installing Your Bath Exhaust Fan

  • Answers to all of your questions about installing a bath exhaust fan and your bathroom exhaust fan replacement project.

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4 Responses to “Bathroom Light Switch Wiring Diagrams”
  1. Tommy says:

    OK here goes. I am changing a light fixture in my bathroom. in the box behind the light I find 4 sets of wires. I notice that when I turn the power off, it shuts down the the lights in my living room, dining room, and kitchen, how do I find and connect the right wire for just that bathroom light with all these other one meeting in that one place?

    • Dave Rongey says:

      Hi Tommy,
      I always recommend that when changing out a light fixture that you only work with the wires that are connected to the existing light fixture, and then the wiring is straight forward. But if for some reason all of the wiring have been taken apart then a voltage tester will need to be used to identify what all of the wires are used for. What we typically discover is that there is only one cable that is the power source, one (or more) cables that travel out to the living room, dining room and kitchen, and then we discover that on cable may be used for switching to hot leg of the circuit for the light fixture. I would suggest taking a look at the wiring diagrams for light switches (as shown above) which will help you understand some of the different wiring scenarios.
      I hope this helps you,

  2. John Robinette says:

    How do i wire a bathroom exhaustfan/light to a 2 way switch? I want to be able to turn on the light & exhaust seperately. It had an old heater fan in the ceiling with one switch operating the heater only.

    • Dave Rongey says:

      If there was only one switch for the original heater fan then an additional cable will be required for the second switch to enable independent switching capability.


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