Honda S2000 Hazard and Turn Signal Flasher Relay Guide (2000-2009)
Fixing turn signal and hazard light problems in your S2000 is a common and straightforward repair.
- The turn signal relay and hazard flasher are the same part on all 2000-2009 S2000s.
- Replacement is a very easy, 15-minute DIY job by swapping the plug-in relay in the under-dash fuse box.
- If you have LED bulbs, you MUST use an electronic/LED-compatible flasher to prevent hyperflash; a standard replacement will not work correctly.
- Before replacing the relay, check the hazard switch on the dash, as a faulty switch can cause identical symptoms.
Symptoms of a Failing Flasher Relay
When the flasher relay in your S2000 begins to fail, the signs are usually obvious. Because this one part controls both turn signals and hazards, a problem with either system can point to the relay. Look out for these common symptoms:
- Turn Signals or Hazards Don't Work: The most common symptom is when your turn signals or hazard lights fail to turn on at all. This can happen intermittently at first before they stop working completely.
- Lights Flash Too Fast (Hyperflash): If you've installed LED turn signal bulbs, you will likely experience hyperflash. The original relay is designed for the higher power draw of incandescent bulbs. When it detects the low power of LEDs, it acts as if a bulb is burned out and flashes rapidly to alert you.
- Lights Get Stuck On: Less commonly, the relay can fail in the 'on' position, causing the turn signal or hazard lights to stay lit without flashing.
Check the Hazard Switch First
A faulty hazard warning button on the dashboard can cause the exact same symptoms as a bad relay, particularly the turn signals not working while the hazards do. The switch can get dirty or wear out internally. Before replacing the relay, try pressing the hazard button several times to see if it restores turn signal function. If it does, the switch is likely the problem, not the relay.
Choosing the Right Aftermarket Flasher Relay
For the 2000-2009 S2000, the OEM flasher relay from Honda is a reliable but costly option. Aftermarket relays offer a significant cost saving and are a perfectly acceptable repair. The brands available fall into different quality tiers.
| Brand Tier | Available Brands | Description |
|---|---|---|
| Standard Replacement | Standard Ignition | A well-regarded aftermarket manufacturer known for producing parts that meet or exceed original specifications. This is a solid choice for a direct, reliable replacement for the stock relay with standard incandescent bulbs. |
| Economy Replacement | True Tech | This brand is positioned as a budget-friendly option. While it will get the job done, it may not have the same long-term durability as a higher-tier brand. It's a good choice if the primary concern is cost. |
Upgrading to LED Bulbs?
If you have installed or plan to install LED turn signal bulbs, you must replace your stock relay with an electronic, LED-compatible flasher. Brands like Novita or Diode Dynamics specialize in these. A standard replacement relay (like Standard Ignition or True Tech) will not solve the hyperflash issue caused by LEDs.
Simple DIY Installation Guide
Replacing the flasher relay is one of the easiest repairs you can do on your S2000. It is a plug-and-play part that requires no special tools.
- Locate the Relay: The flasher relay is located in the interior fuse box, under the driver's side dashboard, to the left of the steering column.
- Access the Relay: You will need to get into the driver's footwell and look up. It can be a tight space. Turning on the hazard lights and listening for the clicking can help you pinpoint its exact location if you're unsure.
- Remove the Old Relay: The relay is plugged directly into the fuse box. It is held in by its electrical prongs and sometimes small plastic clips on the side. Firmly pull the old relay straight out of its socket. You may need to gently rock it back and forth to loosen it.
- Install the New Relay: Align the prongs on the new relay with the slots in the fuse box socket and push it firmly into place until it is fully seated.
- Test the System: Turn the ignition on and test your left and right turn signals, then test the hazard warning lights to confirm everything is working correctly.
Frequently Asked Questions (FAQ)
Where is the hazard flasher located on a Honda S2000?
The hazard and turn signal flasher relay is located in the driver's side under-dash fuse panel, to the left of the steering wheel.
Can I replace the S2000 flasher relay myself?
Yes, this is a very simple DIY job. It is a plug-and-play part that requires no tools and takes about 10-20 minutes. The only difficulty is the tight access to the under-dash area.
Why are my turn signals blinking so fast after installing LED bulbs?
This is called "hyperflash." The original flasher relay is designed for the electrical resistance of incandescent bulbs. Since LEDs use much less power, the relay thinks a bulb is burnt out and flashes quickly as a warning. You need to replace the stock relay with a special electronic LED-compatible flasher to fix this.
Are the turn signal relay and hazard flasher the same part on the S2000?
Yes. For all model years from 2000 to 2009, a single relay controls both the turn signals and the hazard lights.
Technical Specifications
OEM Part Numbers: 38300-S9A-003 38300-SE3-013
Controls both turn signal and hazard light functions. Located in driver's side under-dash fuse panel.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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