# Do I need a resistor for my LED tail lights?

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Most modern vehicles do not have a compatible electrical system to allow a direct replacement of the OEM tail light assembly. You need to fit load resistors on each indicator light and possibly stop, tail and reversing lights as well.

## Do LED lights need resistors?

An LED (Light Emitting Diode) emits light when an electric current passes through it. The simplest circuit to power an LED is a voltage source with a resistor and an LED in series. Such a resistor is often called a ballast resistor. … If the voltage source is equal to the voltage drop of the LED, no resistor is required.

## What happens if you don’t use a resistor with an LED?

When hooking up an LED, you are always supposed to use a current-limiting resistor to protect the LED from the full voltage. If you hook the LED up directly to the 5 volts without a resistor, the LED will be over-driven, it will be very bright for a while, and then it will burn out.

## What size resistor do I need for LED tail lights?

To fix your Turn Signal hyper flash problem, all you need are these 2 Resistors and connectors. If you only installed 2 LED bulbs, one for each of the tail light/turn signal/brake light for example, then you need 2 6 ohm resistors. The wattage should be 50watts.

## Can I connect a LED directly to a battery?

Never connect an LED directly to a battery or power supply because the LED is likely to be destroyed by excessive current passing through it. resistor is suitable for most LEDs if your supply voltage is 12V or less.

## How do I choose a resistor for an LED?

Determine the voltage and current needed for your LED. We’ll use the following formula to determine the resistor value: Resistor = (Battery Voltage – LED voltage) / desired LED current. For a typical white LED that requires 10mA, powered by 12V the values are: (12-3.4)/. 010=860 ohms.

## Do I need a resistor for a 12V LED?

1 Answer. AFAIK there is no, or at least no common, led diode that is typically 12V forward voltage by it self. 12V led are modules that consist of some combination of diodes and resistors to make them suitable for 12V power applications without needing extra current limiting.

## Do you put the resistor before or after the LED?

It doesn’t matter! The resistor can go before – or after – the LED, and it will still protect it. the current that flows out of a battery is always equal to the current that flows back into the battery.

## When should I use a resistor?

The main function of resistors in a circuit is to control the flow of current to other components. Take an LED (light) for example. If too much current flows through an LED it is destroyed. So a resistor is used to limit the current.

## How hot do LED resistors get?

for the standard indicator LEDs, you won’t notice any heat output, as the resistor typically has on order of a 1 milliwatt or so going through it – standard LEDs generally are rated at 20 milliamperes max, while ultra bright LEDs can be operated at about a milliampere.

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## Do LED brake lights need a load equalizer?

LED bulbs are more efficient than incandescent bulbs and consume less power. … A Load Equalizer is required for each incandescent turn signal lamp that is replaced by an LED experiencing ‘bulb-out’ or ‘hyper-flash’ warnings.

## What resistor do I need for 12V LED?

Originally Answered: In order to light an LED with a 12V, what resistor value is needed? LEDs are forward biased for light emitting, In forward bias the resistance value will be less. typically 10 Ohms to maximum 100 0hms. For safe calculation you may take 50 ohms.

## Is Hyper Flash illegal?

Hyper flashing is commonly associated with the problems of having LED lights for your blinkers. … Typically, hyper flashing is regarded as when your blinkers are flashing around 105-115 times per minute. This will cause a variety of issues for other drivers on the road and may even be illegal.

## How many LED load resistors do I need?

If the same circuit wire is feeding into the two bulbs on each side of the truck, you should only need one resistor on each side, in-line with the circuit before the bulb (for a total of two).