A busted tail light may not seem like a major issue, but driving with one is not worth the risk. You could be pulled over, failed during an emissions or safety test, or even involved in an accident, and your insurance may not cover the damages because your vehicle was not street legal. Besides, tail lights are an essential safety feature, alerting other drivers of your presence, especially at night or in low-visibility conditions. So, if you find yourself looking for how to fix a broken tail light, read on.
The first step in fixing a broken tail light is determining the exact problem. Note if there is any visible damage to the light fixture, the bulb, or the wiring. If there is any broken glass, carefully remove it while wearing gloves. Inspect the lightbulb for any signs of damage, such as cracks or dents, or simply its filament may be burnt out. In most cases, replacing the bulb is the easiest and most affordable solution to fix a broken tail light. If the bulb is intact but the fixture is damaged, you may need to replace or repair the entire tail light assembly.
Replacing a tail light bulb is relatively straightforward and can usually be done with a few simple tools. In most cases, you will need a screwdriver to access the bulb and a replacement bulb. It is important to use the correct type of bulb for your tail light, as the wrong bulb could cause damage or create a safety hazard. If you are replacing the entire tail light assembly, the process will vary depending on the make and model of your vehicle. It is important to follow the manufacturer’s instructions and take necessary safety precautions, such as disconnecting the battery before beginning the repair.
Identifying the Issue
Determining the root cause of a broken tail light is crucial before initiating repairs. Begin by visually inspecting the assembly for any obvious damage, such as cracks, chips, or missing pieces. Additionally, check the surrounding area for any loose or disconnected wires that may be hindering the light’s functionality.
Proceed to engage the electrical system by turning on the headlights and pressing the brake pedal to illuminate the tail light. Observe if the light remains unresponsive or exhibits dim or flickering illumination. These symptoms may indicate a problem with the bulb itself, a faulty socket or wiring issue, or a malfunctioning brake light switch.
If you possess a multimeter, conduct a continuity test to ascertain the condition of the bulb and the circuit. By connecting the multimeter to the terminals of the bulb and measuring the resistance, you can determine if the bulb is intact. Similarly, testing the wiring harness for continuity can reveal any breaks or shorts that could disrupt the flow of electricity to the tail light.
In the absence of a multimeter, you can perform a rudimentary bulb check by swapping the suspected faulty bulb with a known working one. If the replacement bulb illuminates, the original bulb is likely defective and requires replacement.
| Potential Causes | Symptoms |
|---|---|
| Broken Bulb | No illumination, dim illumination |
| Faulty Socket | Intermittent illumination, flickering |
| Damaged Wiring | No illumination, erratic illumination |
| Malfunctioning Brake Light Switch | No illumination when brake pedal is pressed |
Removing the Tail Light Assembly
Locate and Remove the Tail Light Assembly
The tail light assembly is typically secured by bolts or screws. Locate the fasteners and remove them using a wrench or screwdriver. Once the fasteners are removed, gently pull the tail light assembly away from the vehicle’s body. Be careful not to damage any wiring or connectors.
Disconnect the Electrical Connectors
Locate the electrical connectors that supply power and ground to the tail light assembly. Carefully disconnect the connectors by pressing the release tabs and pulling them apart. Make sure not to damage the terminals or wires.
Remove the Tail Light Assembly
Once the electrical connectors are disconnected, the tail light assembly can be removed. Carefully lift the assembly out of the vehicle’s body. If there is any resistance, check for any remaining fasteners or obstructions.
| Year | Model | Fastener Type |
|---|---|---|
| 2000-2005 | Toyota Corolla | Phillips Screws |
| 2006-2010 | Honda Civic | 10mm Bolts |
| 2011-2015 | Ford Focus | T25 Torx Screws |
Replacing the Bulbs
Replacing blown bulbs in a tail light assembly is a relatively simple task that can be accomplished in a few steps. Here’s a detailed guide:
1. Gather Tools and Materials
- New replacement bulbs (refer to the owner’s manual for the correct type)
- Socket wrench or screwdriver (depending on the bulb type)
- Gloves (optional but recommended)
2. Access the Bulb Socket
Locate the taillight housing and remove the bolts or screws holding it in place. Gently pull the housing assembly towards you to gain access to the bulb socket.
3. Remove the Old Bulb (With Added Detail)
Depending on the type of bulb, remove it carefully:
| Bulb Type | Removal Method |
|---|---|
| Bayonet Base (e.g., BA15d) | Push in slightly and twist counterclockwise |
| Push-In Base (e.g., 1156) | Grip firmly and pull straight out |
| Wedge Base (e.g., 3157) | Push in slightly at the bottom and slide out |
Note: Avoid touching the new bulb with bare hands, as oil from your fingers can shorten its lifespan.
Inspecting the Wiring
Once you’ve identified the faulty tail light, the next step is to inspect the wiring. A break in the wire or a loose connection can cause a tail light to malfunction. Here are the detailed steps to inspect the wiring:
- Locate the wiring harness: Find the wiring harness that connects the tail light to the vehicle’s electrical system. The harness typically consists of several wires bundled together in a protective sleeve.
- Inspect the wires: Carefully examine the wires for any visible damage. Look for cuts, breaks, or frayed insulation. Gently bend the wires to check for any internal breaks.
- Check the connectors: Disconnect the wiring harness from the tail light assembly. Inspect the connectors for any corrosion, dirt, or loose terminals. Clean the connectors with a wire brush or contact cleaner if necessary.
- Test the wiring continuity: Using a multimeter, test the continuity of the wires in the harness. Set the multimeter to the continuity setting and touch the probes to each end of a wire. If the multimeter beeps, the wire is continuous. If no continuity is detected, there may be a break in the wire or a faulty connection.
- Check the ground connection: The tail light assembly is grounded to the vehicle’s chassis. Inspect the ground connection for any corrosion or loose connections. Clean the ground connection with a wire brush and tighten the bolts or nuts that secure it.
| Item | Description |
|---|---|
| Wiring harness | Bundle of wires connecting the tail light to the vehicle’s electrical system |
| Connectors | Plugs that connect the wiring harness to the tail light assembly |
| Multimeter | Electrical measuring device used to test continuity |
| Ground connection | Electrical connection that connects the tail light assembly to the vehicle’s chassis |
Troubleshooting Electrical Problems
Inspect the Fuse
A blown fuse is a common cause of a broken tail light. Locate the fuse box, usually located under the dashboard or in the engine compartment. Check the fuse labeled “tail lights” or “rear lights”. If the fuse is blown, replace it with a new one of the same amperage.
Check the Bulb
If the fuse is intact, the next step is to check the bulb. Remove the tail light assembly and access the bulb. Inspect the bulb for any damage or burn marks. If the bulb appears damaged, replace it with a new one of the same type.
Clean the Socket
A dirty or corroded socket can prevent the bulb from making proper contact. Use a soft cloth or a contact cleaner to clean the socket and the bulb contacts. Ensure they are free of dirt and debris.
Check the Wiring
Inspect the wiring harness for any visible damage, such as cuts or tears. If you find any damaged wires, repair or replace them as necessary. You can use electrical tape or solder to secure the wires.
Test the Ground
A poor ground connection can also cause a tail light to fail. Locate the ground wire, usually connected to a metal surface on the car’s body. Ensure the ground wire is clean and has a secure connection. If necessary, tighten the connection or use a wire brush to clean it.
| Test | Condition |
|---|---|
| Fuse | Replace if blown |
| Bulb | Replace if damaged |
| Socket | Clean with contact cleaner |
| Wiring | Repair or replace damaged wires |
| Ground | Ensure clean and secure connection |
Cleaning the Contacts
Dirty or corroded contacts can prevent your tail light from functioning properly. To clean the contacts, you’ll need a few tools:
- A soft cloth or brush
- Rubbing alcohol
- Electrical contact cleaner (optional)
Follow these steps to clean the contacts:
1. Disconnect the negative battery terminal.
2. Locate the tail light assembly.
3. Remove the tail light assembly from the vehicle.
4. Disconnect the electrical connector from the tail light assembly.
5. Use a soft cloth or brush to remove any dirt or debris from the contacts.
6. Apply a small amount of rubbing alcohol to the contacts using a cotton swab or Q-tip. Gently scrub the contacts until they are clean.
7. (Optional) If you have electrical contact cleaner, apply a small amount to the contacts using the provided applicator.
8. Allow the contacts to dry completely.
9. Reassemble the tail light assembly and reconnect the electrical connector.
10. Reconnect the negative battery terminal.
11. Test the tail light to ensure it is functioning properly.
Reinstalling the Tail Light Assembly
Once you’ve replaced the bulb or socket, it’s time to reinstall the tail light assembly. Here are the steps:
- Align the assembly with the body of the vehicle.
- Insert the top of the assembly into the corresponding slots or clips.
- Push down on the bottom of the assembly until it snaps into place.
- Reconnect any electrical connectors if they were disconnected.
- Tighten any screws or bolts that hold the assembly in place.
- Check the operation of the tail light to ensure it’s working properly.
- Repeat the process for any other affected tail light assemblies.
If you’re having difficulty reinstalling the tail light assembly, consult your vehicle’s owner’s manual or seek professional assistance.
Additional Tips for Reinstalling the Tail Light Assembly
| Situation | Solution |
|---|---|
| The assembly doesn’t fit snugly. | Make sure the alignment is correct and that all clips or slots are engaged. |
| The screws won’t tighten. | Check if the threads are damaged or stripped. If necessary, replace the screws. |
| The tail light is not working properly. | Double-check the electrical connections and replace the bulb or socket if needed. |
Testing the Tail Lights
To test your tail lights, follow these steps:
1. Safety First
Park your car on a flat, level surface. Engage the parking brake.
2. Check the Bulbs
Open the trunk or tailgate and locate the tail light assemblies. Remove the socket holding the bulb in place and visually inspect the bulb for any cracks or damage. If the bulb looks damaged, replace it.
3. Test the Sockets
Reinsert the bulb into the socket. Ensure it’s making good contact by gently twisting it. Turn on the headlights and check if the tail light illuminates.
4. Inspect the Lenses
Exam the tail light lenses for any cracks, fogging, or discoloration. If the lenses are damaged, they may need to be replaced.
5. Electrical Connections
Check the wiring harness for any loose or damaged wires. Secure any loose connections and repair any broken wires.
6. Fuse Check
Locate the fuse box in your vehicle’s interior. Consult your owner’s manual to identify the fuse responsible for the tail lights. Check if the fuse is blown; if so, replace it.
7. Turn Signal Functionality
Turn on the turn signals and check if the corresponding tail light flashes. This ensures that the wiring for the turn signals is functioning properly.
8. Troubleshooting
If the tail lights are still not working, it may indicate a deeper issue. Consider the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| One tail light is dim | Loose connection or faulty bulb | Tighten the connection or replace the bulb |
| Tail lights intermittently work | Damaged wiring or faulty relay | Inspect the wiring harness and replace the relay if necessary |
| Tail lights don’t work at all | Blown fuse or damaged wiring harness | Replace the fuse or repair the wiring harness |
Preventing Future Issues
Regular maintenance is key to preventing future tail light issues. Here are some tips to help keep your tail lights in good condition:
- Check your tail lights regularly. Inspect the lenses for any cracks or damage that could allow moisture to enter. Also, check the bulbs for any signs of burnout or filament damage.
- Clean your tail lights. Dirt and grime can build up over time, blocking the light from the bulbs. Clean your tail lights regularly with a mild soap and water solution to keep them clear.
- Protect your tail lights from impact. Avoid driving over large objects or potholes that could puncture the lenses. If you do hit something, inspect your tail lights for any damage.
- Use LED bulbs. LED bulbs are more durable and last longer than traditional incandescent bulbs. They are also more resistant to vibration and impact.
- Have your tail lights inspected by a mechanic. If you are having repeated problems with your tail lights, have them inspected by a mechanic. They can identify and fix any underlying issues that may be causing the problems.
- Follow the manufacturer’s recommendations. Refer to your vehicle’s owner’s manual for specific guidelines on how to maintain and replace your tail lights. They may have specific procedures or precautions that you should follow.
9. Additional Tips for Preventing Future Issues
| Tip | Explanation |
|---|---|
| Use a moisture-resistant sealant | Apply a small bead of clear silicone sealant around the edges of the tail light lens and housing to prevent moisture from entering. |
| Inspect wiring connections | Check the electrical connectors for any loose wires, corrosion, or damage. Clean and tighten any loose connections. |
| Replace tail lights when necessary | If your tail lights have become severely damaged or are no longer functioning properly, it is important to replace them promptly. |
1. Gather Your Materials and Safety Gear
Before starting, gather the necessary tools and materials, such as a new tail light, light bulb, screwdriver, wrench, multimeter (optional), and safety glasses.
2. Park in a Safe Location
Park your vehicle on a level surface and engage the parking brake. If possible, park in a well-lit area for visibility and safety.
3. Identify the Faulty Tail Light
Inspect the tail light assembly for any visible damage or loose wires. Test the tail light by turning on the headlights and brake lights. Identify which specific light is not functioning.
4. Remove the Tail Light Assembly
Locate the mounting screws or bolts holding the tail light assembly in place. Use the appropriate tool to remove these fasteners and carefully pull the assembly out.
5. Replace the Light Bulb or Tail Light
If only the light bulb is burned out, replace it with a new one of the same type and wattage. If the entire tail light assembly is damaged, replace it with a new one.
6. Reinstall the Tail Light Assembly
Align the new tail light or light bulb properly and insert it back into its housing. Secure it with the mounting screws or bolts that you removed earlier.
7. Test the Function
Turn on the headlights and brake lights to verify that the new tail light is functioning correctly. Ensure that both the tail light and brake light are working as intended.
8. Inspect for Water Damage
Check the tail light assembly for any signs of water damage, such as condensation or corrosion. If present, address the water source and seal any cracks or gaps in the assembly.
9. Clean the Lenses
Clean the tail light lenses with a soft cloth and glass cleaner to remove dirt and grime that may affect visibility.
Additional Tips for Safety and Efficiency
10. Use the Right Tools
Ensure you have the appropriate tools and equipment for the task, including a multimeter to test electrical connections and a torque wrench to tighten bolts properly. Avoid using makeshift tools or improvising with unsuitable substitutes.
| Tool | Purpose |
| —- | —- |
| Screwdriver | Removing and installing screws |
| Wrench | Tightening and loosening bolts |
| Multimeter | Testing electrical continuity and voltage |
| Torque wrench | Ensuring proper bolt tightening |
11. Double-Check Connections
After replacing the tail light or bulb, double-check all electrical connections to ensure they are secure and free of corrosion. Loose or faulty connections can lead to flickering or malfunctioning lights.
12. Regularly Inspect Tail Lights
Establish a regular maintenance schedule for inspecting tail lights and replacing bulbs as needed. This proactive approach helps prevent unexpected failures and ensures optimal visibility on the road.
