Load Resistor FAQ

Fixing LED Fast Blinking- When and Why you may need load resistors for your vehicle?

When you upgrade your stock lamps to LED bulbs replacement, one of the most common issues is the fast blinking. For safety reason, most vehicles' system will then tell the driver a bulb somewhere on the car is wrong or burned out.
  • How does the car recognize that there is a bulb out?
There is a part system in the vehicle that controls when to hyper flash or show a warning. It's called a flasher unit. Each vehicle's flasher unit is designed to monitor the electrical load that it is powering. This basically means that the flasher unit knows how much current your cars factory bulbs will draw when they're in use. It monitors the vehicle's left/right circuit or monitors all 4 bulbs independently.
When one of the bulbs is burnt out, removed, or replaced with a lower wattage bulb/LED, the flasher does its job and starts flashing at a faster pace on the side of the car that this has occurred.
LED lights draw about 5W of power, which is much less than that of a halogen bulb(27W~30W).  An error code or hyper-flashing is a malfunction that will come up to notify the driver when vehicle detects a change in the power draw.  The vehicle is recognizing the upgraded LED bulb as a faulty(burned) halogen bulb due to the low power consumption.
  • How to prevent the car from hyper flashing/fast blinking?
There are 2 methods to avoid the issue: one way is to replace the flasher unit in your vehicle, the other way is to add enough load back onto the system to trick the electrical system into thinking that nothing has changed. Correcting hyper flash or bulb out warnings when you upgrade is relatively easy once you understand what needs to be done.
  • How to install the load resistor?
We have most of the bulbs' directly plug and play load resistor,please click here to view how to install the loa resistor.
if you are interested to buy, please click here

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