How to Fix Hyper-Flashing with LED Lights
Fix Hyper-Flashing with a Load Resistor, Relay, or Anti-Flicker LED
You've just installed new LED turn signals and suddenly they're blinking twice as fast as normal. The good news — your lights aren't faulty. This is a very common issue called hyper-flashing, and it has a straightforward fix.
Why Is This Happening?
Your vehicle's turn signal relay was designed for halogen bulbs, which draw significantly more current than LEDs. When the relay detects less current than expected, it assumes a bulb has burned out — and increases the flash rate to alert the driver.
It's not a fault. It's your vehicle doing exactly what it was designed to do — just with the wrong type of bulb in mind.
| Halogen Bulb | LED Bulb | |
|---|---|---|
| Current draw | Higher | Much lower |
| What relay thinks | Normal operation | Bulb burned out |
| Result | Normal flash rate | Hyper-flashing |
How to Fix It
There are three solutions depending on your vehicle and setup:
Option 1 — Install a Load Resistor
A load resistor is wired in parallel with the LED turn signal to simulate the higher resistance of a halogen bulb. The relay detects a normal load and flashes at the correct rate.
Best for: Vehicles where replacing the flasher relay is not practical or accessible.
⚠️ Load resistors generate heat during operation. Mount them away from heat-sensitive components and ensure adequate ventilation.
Option 2 — Replace the Flasher Relay
Swap the factory flasher relay for an LED-compatible electronic flasher relay. Unlike the original relay, an LED flasher is not load-dependent — it flashes at the correct rate regardless of how much current the bulb draws.
Best for: Vehicles where the flasher relay is easily accessible and you want a clean, permanent solution with no extra hardware.
Option 3 — Use J.W. Speaker Integrated Anti-Flicker Lights (Jeep JK owners)
If you drive a 2007–2018 Jeep Wrangler JK, the easiest solution is to use J.W. Speaker headlights and turn signals that have integrated anti-flicker technology built in — no external harness, no resistors, no relay swap needed.
Compatible J.W. Speaker products with integrated anti-flicker:
- 8700 Evolution J2 Series Headlights
- EVO J3 Series Headlights
- Model 239 J2 Turn Signals
💡 Plug in and go. No additional hardware required on Jeep JK models.
Which Solution Is Right for Me?
| My Situation | Recommended Fix |
|---|---|
| Jeep JK with J.W. Speaker lights | Use integrated anti-flicker J-Series lights — no extra parts needed |
| Easy access to flasher relay | Replace with an LED-compatible electronic flasher relay |
| Relay not accessible or hard to replace | Install a load resistor in parallel with each LED signal |
Still Hyper-Flashing After Trying These Fixes?
If hyper-flashing persists after applying one of the above solutions, the issue may be related to additional LED modifications on your vehicle. Multiple LED upgrades — for example, front turn signals combined with LED tail lights — can combine to create an overall resistance level that is still too low.
In this case, the total circuit resistance across all modifications needs to be addressed, not just one individual light.
🔍 Contact your authorized J.W. Speaker dealer for help diagnosing a persistent hyper-flashing issue. Find a Dealer — jwspeaker.com/dealers
Frequently Asked Questions
Is hyper-flashing bad for my vehicle? It won't damage your vehicle, but it does mean your turn signals are not functioning as legally required — and it can be distracting to other drivers. It should be corrected.
My Jeep JK still hyper-flashes even with J.W. Speaker lights — why? Check whether you have other LED modifications installed on the vehicle. Additional LED front turn signals or other low-resistance modifications can cause hyper-flashing even when J.W. Speaker integrated anti-flicker lights are fitted. An external load resistor sized for the full circuit may be required.
Will the load resistor fix work permanently? Yes — as long as the resistor is correctly sized and properly installed, it is a permanent solution.