Troubleshooting Honda Accord Signal Lights Not Working – A Mechanic’s Guide

It can be frustrating and dangerous when your Honda Accord signal lights stop functioning correctly. Indicators and hazards are essential for safe driving and communicating your intended actions to other motorists. As an expert, I recommend first inspecting bulbs, fuses, electrical connections, flasher units, and ground wires. 

With some basic mechanical skills and the proper diagnostic approach, you can often resolve Honda Accord signal lights not working yourself. A professional mechanic has the skills and tools to trace and repair complex electrical issues if needed efficiently. This article will discuss common causes and solutions to restore proper turn signal operation on your Honda Accord.

Why Honda Accord Signal Lights Not Working?

  1. Check the Bulbs
  2. Inspect Fuses
  3. Check Electrical Connectors
  4. Test the Flasher Unit
  5. Verify Ground Connections
  6. Inspect the Turn Signal Switch

Check The Bulbs

The first step in diagnosing Honda Accord signal lights not working is visually inspecting all front and rear bulbs. Over time, the filament inside halogen or LED bulbs can burn out or become damaged. 

I recommend having a helper watch the lights while you activate the signals. Check that the correct bulbs are illuminating on each side. Swap the suspect bulb to the opposite side to test if the issue follows the bulb. If the new bulb works, replace the faulty one with an equivalent bulb. Using the incorrect bulb type can lead to rapid failure or abnormal operation.

Inspect Fuses

If replacing the bulb does not resolve the issue, I move on to testing the fuses. The turn signals use dedicated fuses to protect the flasher unit and wiring from excessive current draw. Locate the fuse box and use the fuse diagram inside the lid to identify the appropriate signal fuse. 

Pull it straight out and inspect the metal wires inside the translucent plastic housing. An intact fuse will have an unbroken wire extending through it. A blown fuse will have a melted or severed wire. Replace any faulty fuses with identically rated parts. I keep spare fuses with my emergency kit to allow quick roadside repairs.

Check Electrical Connectors

Assuming the bulbs and fuses check out, problems with Honda Accord signal lights can also result from damaged connectors or wiring. I methodically inspect each connector leading to signal lights for corrosion, bent pins, and looseness. 

Spray electrical contact cleaner into corroded sockets and firmly plug in the connector several times to scrape away grime. For loose connectors, securing the locking tab or replacing the terminal may be required. Check for rubbing or vibration damage to wires.

Test The Flasher Unit

The flasher unit is the control module that activates the turn signals by audibly clicking. The flasher is likely defective if you hear no clicking when operating the signal. 

Finding the unit differs across Honda models, but the part is often under the dash or near the fuse box. Swap in a known good flasher from another circuit, or have an auto parts store test yours for continuity. Only use flashers rated specifically for your Honda Accord.

Verify Ground Connections

Proper grounding is imperative for completing the signal circuit in your Honda. Corrosion on ground points can increase resistance, causing voltage drops that prevent correct light operation. 

Ensure wires are tightly fastened to bare metal with quality crimp ring terminals. Scrape away paint and debris from ground points and reconnect wires securely. Ground straps between the chassis and engine should be cleaned or replaced if damaged.

Inspect The Turn Signal Switch

The final possibility I check is the steering column’s malfunctioning turn signal switch. These switches endure constant movement and can wear internally over time. Switch failure can cause signals not to activate or flash erratically. 

I determine if the switch is faulted by tapping it while operating to see if the lights change behavior. Replacement may be required if tapping or cleaning the switch contacts does not help.

When To Call A Professional?

While many causes of Honda Accord signal lights not working can be addressed without professional help, complicated electrical issues are best left to expert mechanics with the tools and know-how to diagnose and repair your vehicle efficiently. 

If you’ve methodically checked the bulbs, fuses, connectors, flasher, grounds, and switch without success, avoid frustration by having an experienced technician troubleshoot further. With specialized equipment like multimeters and wiring diagrams, we can promptly trace electrical faults down to the wire or component responsible for the failure.

Also Read: How To Replace Honda Accord Tensioner?

Why Are The Lights Not Working On My Turn Signal Switch?

There are a few reasons why the lights may not work on your Honda Accord’s turn signal switch. The most likely culprits are:

  1. A bad turn signal switch.
  2. Faulty flasher relay.
  3. There is an issue with the wiring between the switch and the lights.

Start by jiggling the turn signal lever while operating it to see if the contacts are dirty or worn out. Tap on the flasher relay to listen for proper clicking sounds. Inspect all visible wiring for damage, corrosion, or loose connections. 

If those items check out, the switch itself may need replacement, or there could be an open circuit in the wiring that will require a more thorough diagnostic. An experienced mechanic can efficiently trace and pinpoint any wiring faults leading to your non-functional turn signals.

How Do I Fix My Turn Signal Light?

Start by replacing the bulb and installing the correct bulb type and wattage. Inspect the socket for corrosion and damage. Check the flasher relay by swapping it with a known good unit or testing it. Verify the turn signal fuse is not blown. 

Ensure wiring connectors to the bulb are fully plugged in and not corroded. Clean any dirty electrical contacts in the socket or connectors. If those steps don’t restore function, a wiring fault or bad switch may require professional diagnosis and repair.

How Do I Know If My Flasher Relay Is Bad?

Warning signs of a bad flasher relay include no audible clicking sound when operating the turn signals, signals blinking abnormally or too quickly, or lights not flashing. First, locate the flasher unit and give it a light tap to check for proper clicking while the signals are on. 

Swap the suspected bad flasher into a different circuit to test it. Have an auto parts store test the relay for continuity or replace it with a new part as needed. Only use a flasher rated for your specific Honda Accord’s electrical system.

Where Is The Indicator Flasher Relay?

The location of the turn signal flasher relay varies across Honda Accord models and years. Common spots to check include under the dashboard, around the steering column, inside the engine bay fuse/relay box, and near the battery. 

Consult your owner’s manual for the exact location. Finding wiring diagrams specific to your car can also help pinpoint the flasher relay’s whereabouts. An experienced mechanic is your best resource for tracking hard-to-find components like the elusive flasher unit.


Properly functioning turn signals are a key element of safe driving, so Honda Accord signal lights not working should be promptly addressed. You can often resolve common issues like burnt bulbs or blown fuses with some DIY troubleshooting. For more complex electrical problems, rely on the expertise of professional mechanics. 

We have the tools, resources, and experience to correctly trace and repair wiring faults or component failures in your Honda Accord’s turn signal system. With the guide outlining the diagnostic basics, you’ll be prepared to restore your Honda Accord’s signals to full working order.

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Ammar Masoud

I have had a long and fulfilling career in the automotive industry, primarily with Honda and Acura. With 15 years of experience as a Honda service technician, I became highly skilled in repair and maintenance, gaining a deep understanding of these vehicles. After many years in the automotive field, I decided to embark on a second career in industrial manufacturing. It was a significant change, but I found that the skills I had honed in the automotive industry were incredibly valuable in my new role. In my current position in industrial manufacturing, the demand for quality workmanship and meticulous attention to detail is paramount. Fortunately, these are traits that I have cultivated throughout my years in the automotive industry. I take pride in applying these skills to meet the high standards expected in the manufacturing sector.