How do I Locate a Doorbell Wire in the Wall? (10 Steps To Wire A Doorbell)


The doorbell is a tiny but significant part of our homes. Your visitors and delivery guys announce their arrival using a doorbell. Most modern homes have doorbells that, at some point, need repair. You’d have to fix or replace it with a new one. When you are faced with this situation, you will be forced to ask

The doorbell wire is usually located inside the doorbell transformer which is near the main electrical panel. Doorbell wiring, like the wiring of all kinds, requires precision to avoid improper connections. It would be best if you first located the doorbell wire in your home electrical system and then installed a new one. Here’s a guide to help you locate and wire your home’s doorbell.

How do I Locate a Doorbell Wire in the Wall?

The doorbell wire is found in the doorbell transformer. The doorbell transformer is usually located near the main electrical panel or on the panel. There’s no standard location for the doorbell transformer: its location depends on the source of electricity, the site of the chime, etc.

A doorbell consists of three main parts: the button on the wall outside, an electric transformer, and a chime inside. If you’re replacing an existing doorbell, you’ll want to start by locating its wires. This is usually pretty easy to do — follow the cables from your existing doorbell back to their source, either inside or outside your home.

Possible locations for the doorbell wire include:

  1. Near the telephone box: If the doorbell transformer is not in the electrical panel or near it, the next possible location is the telephone box outside your house. The doorbell wires are about the same size as the telephone wire in the box, so if you’re trying to identify the doorbell wire, the telephone box is a good place to check.
  2. The control panel of your home’s sound system: Depending on the location of the chime, the doorbell transformer can be found in the control panel of your home’s sound system.
  3. At the Garage: The doorbell transformer may be connected to the electrical outlet that supplies electricity to the garage door opener. The garage door opener outlet is commonly found in the garage, but in some cases, it is attached to the ceiling to check up there too
  4. In the Closet: In some cases, the transformer is located in the walls opposite your closet.
  5. In the Attic: The doorbell transformer can also be attached to the wall in the basement or stairway and plugged into an electrical outlet.
  6. Furnace room or HVAC closet: Doorbell transformer can be installed in the HVAC closet or furnace room.

Do You Need An Electrician To Locate A Doorbell Wire?

You don’t need an electrician to locate the doorbell wire but contact an electrician to help you repair and install your doorbell if you feel you’re not up for it. You can identify and wire the doorbell yourself, although that depends on how well you follow the guide we’ve provided on doorbell wiring.

The first thing to check is whether your existing doorbell has been wired in the past. If it has been wired by an electrician or by yourself, it will probably have a transformer box that houses the wiring and power supply for the doorbell.

Steps By Step Procedure On How To Wire A Doorbell

Wireless and wifi model doorbells aren’t connected the same way as hardwired doorbells. They do not require wiring, but if you are using hardwired doorbells,  you’ll have to wire them manually or contact an electrician. Wiring the doorbell is a simple procedure.

Note that the steps listed here are for wiring doorbells into an existing wiring system. If your home’s electrical connections don’t cover doorbell wiring, contact an electrician for proper wiring. Disconnect the doorbell from the power source at the main electricity supply or the circuit breaker. Next, follow the steps outlined here to wire your doorbell.

Step 1: Replace the doorbell transformer in the junction box

  • Find the electrical supply wires
  • Pass the wires through the holes onto the electrical junction box.
  • On the side of the junction box is an opening. Place the transformer inside and fasten it onto the junction box using a wrench or screwdriver, as the case may be.

Step 2: Reconnect the doorbell transformer wires with the home electrical supply wires

  • Connect the wires at the cap: green wires with green; white goes to white, and black goes with black.
  • Secure the wire caps by twisting them onto the connections or with a Vinyl electrical tape.

Step 3: Cover the junction box

  • Put the junction box back in its place to secure the components.
  • Screw the screws or bolts back in place.

Step 4: Connect the doorbell and chime wires to the correct terminals

  • Connect the chime and doorbell button wires to the correct terminals by wrapping and screwing them down with a screwdriver.

Step 5: Connect the doorbell button exterior wires

  • On the back of the doorbell button, attach the exterior doorbell wires you taped down and screw them to the button’s plate until the cables are firmly secured.

Step 6: Screw the doorbell button unto the wall

  • Place the doorbell button against the wall and screw it in place. Ensure the doorbell is tightly screwed and can not be easily removed.

Step 7: Connect the doorbell chime exterior wires

  • Locate the exterior chime wires you taped down, thread them through the holes in the back of the chime, and secure them in place using electrical tape.

Step 8: Screw the chime to the wall

  • Attach the doorbell chime on the wall where you want it to be
  • Place the two screws on both sides of the chime and screw it onto the wall using a screwdriver.

Step 9: Attach the doorbell terminal wires to the chime

  • Find the three doorbell terminal wire
  • Place each wire in the compatible terminal and secure it using a screwdriver.

Step 10: Test the doorbell

  • Turn on the power supply or circuit breaker.
  • Push the doorbell button until it rings.
  • If it doesn’t, there’s likely another fault in the wiring. Contact an electrician to check it out.

How Do I Remove A Doorbell Wire?

If you want to replace your existing doorbell with a new one, or if you need to install a new doorbell at the front door of your house, then you will need to remove the old one and put in new wires in 3 steps;

  • Remove the doorbell button
  • Remove the chime
  • Remove the doorbell transformer.

The doorbell is connected to electricity so before you remove the doorbell wire, disconnect it from power by turning off the main electricity supply or doorbell transformer circuit breaker. The circuit breaker should be in the basement, garage, or laundry area. As a safety check, connect the probes of a multimeter to the doorbell wires to confirm there’s no electricity in the doorbell before you proceed. You’ll need a screwdriver and a Vinyl electrical tape.

Step 1: Remove the Old Doorbell Button

  • Check for the screws holding the doorbell, push-button the wall, and unscrew it using a screwdriver.
  • For some doorbells, the screws aren’t exposed. First, remove the plate covering the screws using a flathead screwdriver, and then remove the screws.
  • Draw the doorbell button away from the wall
  • Remove the wires. Use a screwdriver to remove the screws holding the doorbell wires behind the button. Detach the doorbell button from the wires
  • Keep the wires safe. You’ll need the doorbell wires when installing a new push button. You can use electrical tape to secure the cables in place.

Step 2: Remove the doorbell chime

  • Remove the plate covering the doorbell chime. The chime is where the sound comes from and is usually close to the front door or other places you can hear the sound.
  • Find the terminal wires. There are three wires connected to the chime’s central terminal. Find, mark, and secure them in place using tape.
  • Disconnect the wires. Unscrew the screws holding the terminal wires inside the chime. Pull them away from the chime.
  • Loosen the large screws holding the chime to the wall and pull off the chime. Hold the wires from the back of the chime to keep them from falling into the wall.
  • Secure the wires using tape.

Step 3: Remove the Doorbell Transformer

  • Locate the doorbell transformer usually found in the garage, closet, or attic. Follow the guide above on where to find the doorbell transformer.
  • Unscrew the screws holding the transformer wires in place.
  • If the doorbell transformer is connected to multiple doorbells, you’ll see more than two terminal wires. Label them and tape them down.
  • Remove the plate covering the electrical junction box to reveal the doorbell transformer’s wiring to your home’s electrical system.
  • Disconnect the power cables. Look for the green, white and black wires connecting the electrical supply to the doorbell transformer. Detach them from the wire caps and separate the wires.
  • Disconnect the transformer from the electrical junction box. The transformer is usually mounted on the junction box using screws or bolts.
  • If you see a screw, use a screwdriver to loosen the screw.
  • If it’s bolted, use a wrench to loosen the bolt.
  • Pull out the transformer from the junction box and tape down the wires.

Why Is Wiring Needed For A Doorbell?

Doorbell wiring is usually done with a bell wire or 18 gauge wire. The terminals on the bell wires are labelled F, R, and C, meaning font, rear, and standard. Some doorbell systems use different buzzes for front and rear doorbells hence the need for labelling. 

Different buzzes or bell tones produce a different sound. If your font and rear doorbell buzzes are other, you can quickly identify where the chime is coming from in your home.

How Hard Is It To Wire A Doorbell?

Wiring a doorbell is a simple procedure, even if it is done yourself. But if you’re not comfortable working with electricity and wiring, it’s best to hire a professional. You don’t want to mess anything up and risk your safety or anyone else’s safety in your home.

The idea is to run the wires from the doorbell transformer and other doorbell parts to the main electricity supply. The average homeowner can install a doorbell in about 30 minutes.

How Do You Install A Doorbell Without An Existing Wire?

If there are no existing doorbell wires in your home electrical system, you must contact an electrician for proper electrical connections before installing a hardwired doorbell. Hardwired doorbells are connected to the main electrical supply through the doorbell’s transformer. 

If you’re not ready to rewire your home electrical system to cover doorbell installations, go for a smart doorbell like the wifi model doorbells that do not require wiring. Wifi-enabled doorbells come with intelligent cameras for extra security.

How Many Wires Does A Doorbell Have?

The most common type of doorbell is the single-button push-button model. This has only one wire from the transformer (the first unit in the power supply line) and goes to your push button. Double button doorbells have two wires running from the transformer to the two buttons or switches.

You can usually tell whether or not your doorbell is a single-button model by looking at it closely. If only one wire is coming from the transformer box (the first unit), it’s probably a single-button model. If two wires are coming out of the box, and they both connect to your push button, it’s perhaps a double-button model.

How Do You Tell Which Wire Is Which In A Doorbell?

The wires in the doorbell can be identified by their color codes; The live wire is black, the neutral is white, and the ground wire is green. The live, neutral, and ground wires are connected to the home electrical supply system from the doorbell transformer.

However, it’s important to remember that this can be reversed depending on where you live. Some countries adopt different color codes for their electrical wiring systems. Confirm from the local electrician before making connections.

Will Doorbell Wires Shock You?

The voltage in doorbell wires is too low to cause an electrical shock if you contact it. The transformer reduces the 120 volts supplied by electrical circuits to between 10 and 16 volts. You shouldn’t be worried about sustaining a shock when repairing or replacing your doorbell.

If there’s a circuit breaker or power surge, straying voltage in your home electrical system can cause the most unlikely electrical appliances and equipment to shock you.

The doorbell will receive too much electricity than it should and generates an electric shock when contacted. Every home electrical system should be founded to prevent damage due to faulty electrical circuits.

Can I Cut Doorbell Wires?

Yes, you can cut the doorbell wire but first, disconnect them from the screws holding them in place. Use a utility knife to cut through any plastic cable jacketing covering wires inside walls or ceilings, and then strip away enough insulation from each wire.

Before cutting doorbell wires, make sure your home’s power supply is turned off to avoid electric shock.


Installing a new doorbell will be simple if you follow the ten steps outlined in this article. Of course, double-check to ensure everything is working once you finish and that there’s no extra noise coming from the chime or any interference from other electronics in the house.

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