Bathroom Fan Light Wiring Diagram: A Step-by-Step Guide.. Attach the mounting plate - Most bathroom fan and light combination fixtures come with a mounting plate that needs to be attached to the fan housing. Secure the mounting plate in place using the provided screws. 6.. When the light is on, the fan is on as well. Having the fan wired directly to the light may not be an ideal situation. If you elect to replace your old exhaust fan with a combination unit that includes a heater and a light, you will probably need to add additional wiring and switches to control all the heater, light, and fan separately.
Understanding the wiring diagram for bathroom lights and fans is crucial when it comes to installing or troubleshooting these essential fixtures in your bathroom. A typical bathroom setup includes a light fixture and an exhaust fan, often operated by a single switch.. Shared ground on bathroom light, fan, heater combo - Home. Exhaust Fan.. Step 6 - Wire the Bathroom Fan And Light Switch Combo. If you only had one switch: Connect the wires to the switch. If you only had one switch previously, it is as easy as taking the hot wire coming from the fixtures and hooking it on to one of the brass screws on the switch.