How to Replace a Brake Light Bulb

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When brake light bulbs burn out, it is seriously inconvenient. It is always a good idea to have somebody check your brake lights, and most of the time there isn't that extra somebody to help you out. The easiest way to check your brake lights without an extra leg laying around would be to set a brick or something heavy enough on the brake pedal to trigger the brake lights to come on. If the brake light is slow to come on, is dimmer than usual, or the Brake Warning Light comes on, then your brake light bulb may be failing.

Part 1 of 1: Replacing a brake light bulb

Materials Needed

easy access to brake light socket

Step 1: Easy access bulb replacement. Some manufacturers have made it easier to replace bulbs in cars and SUV’s by allowing access through the inside of the vehicle.

If your vehicle has this type you can skip steps 2 through 4. If you have easy access, you may need to easily open the flap or panel over the inside of the brake light lens. By accessing the inside of the brake light lens you will see the brake light bulb socket.

mounting bolt covers being removed withe a screwdriver

Step 2: Locate the mounting bolts. When locating the mounting bolts on your lens assembly, many are obvious but some are covered by cosmetic covers that easily pop off.

removing the mounting bolts with ratchet

Step 2: Remove the mounting bolts. Once you have found the mounting bolts, remove and set the bolts aside.

removing the tail light lens

Step 4: Remove the tail light lens. Most tail light assemblies come right off.

If it gives some resistance, pay attention to the direction the tail light lens is installed and pull straight out.

Step 5: Locate the burnt bulb. Once the tail light assembly is removed, locate the brake light bulb socket.

If you are unsure which socket is for the brake light, either have somebody depress the brake pedal or turn on your hazards.

removing the burnt brake light bulb

Step 6: Removing the brake light bulb. The bulb socket has a release tab; turn counterclockwise to remove.

To remove the brake light bulb make sure the lights are off and the bulb is cool to the touch. Pull the brake light bulb out of the socket.

Step 7: Identifying the correct light bulb. After the brake light bulb is removed, take a look at the numbers on the bulb and match them to the new bulb.

applying dielectric grease to brake light socket

Step 8: Apply dielectric grease. Apply dielectric grease to the brake light bulb socket.

A pea sized amount is enough to apply to the socket.

installing the new brake light bulb

Step 9: Install the bulb. Take the new bulb and install it into the brake light socket.

turning the light socket clockwise to lock

Step 10: Mount brake light socket. Mount the brake light socket, match the tabs on the socket and the tail light lens, and, once inserted, turn clockwise to lock.

testing the brake light bulb before mounting

Step 11: Test the brake light function. Before mounting the brake light lense, test the brake light function.

Step 12: Install the tail light. Line up the tail light and slide into position; line up the mounting holes, and start the mounting bolts.

Step 12: Tighten the mounting bolts. Mounting bolts are tightened hand tight.

Brake light bulb are very important for the driver, passengers, and surrounding traffic. Making sure your headlights, running lights, brake lights, hazards, and turn signals are operating is a safety essential. If replacing a brake light bulb is something you would rather leave to a professional, have one of YourMechanic’s certified technicians perform the replacement.


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Recent Lights (Headlamps/beams/brakes) Inspection reviews

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YourMechanic Lights (Headlamps/beams/brakes) Inspection Service

Average Rating

4.8/5

Number of Reviews

127

Rating Summary
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Mitchel

22 years of experience
217 reviews
Mitchel
22 years of experience
Mercedes-Benz E350 - Lights (Headlamps/beams/brakes) - Miami, Florida
Great service! On time, service performed quickly. Mitchell knows what he is doing and made me feel confident while he worked on my MB E350.
Mercedes-Benz ML350 - Lights (Headlamps/beams/brakes) - Miami, Florida
He is very professional and gives great advice and explains all of what he will do to the car. Will show you what’s wrong and explains to you what is to be done.

James

6 years of experience
127 reviews
James
6 years of experience
BMW 328i - Lights (Headlamps/beams/brakes) - Decatur, Georgia
Mechanic was very knowledgeable and personable. Would definitely recommend for any of your car services.

Nathaniel

8 years of experience
135 reviews
Nathaniel
8 years of experience
Chevrolet Malibu - Lights (Headlamps/beams/brakes) - Norfolk, Virginia
Nathaniel was very professional. He knows what he is doing. He get to the site and is ready to work.

Brian

16 years of experience
74 reviews
Brian
16 years of experience
Chevrolet Spark - Lights (Headlamps/beams/brakes) - Elk Grove, California
Brian was fantastic. Diagnosed and fixed the problem which was a serious head scratchier. I highly recommend Brian.

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