If you don t install load resistors also known as equalizers with led turn signal bulbs you will experience the notorious hyper flash issue.
Adding load resistors for led turn signal light bulbs.
A load resistor is required for each led light bulb in the turn signal circuit you may only want to upgrade the rear of the vehicle.
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You will need 1 load resistor for each led turn signal bulb installed.
If you will have glass andled bulbs on one vehicle you do notneed to add a load resistor to any glass bulb only led.
Hyper flash is exactly what it sounds like where the turn signal light flashes rapidly and is almost headache inducing.
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This installation guide will show you how to install the load resistors for turn signal lights to prevent the hyper flash why do i need to install load resis.
To add a load resistor to an indicator turn signal it has to be wired into each led light bulb in parallel.
Should this occur the solution is simple and readily available.
Another slightly better solution for adding resistance to the circuit is to buy a load resistor or a dummy load.
Led bulb bulb socket splice here splice here power wire secondary power wire ground wire load resistor.
A load resistor essentially serves the same purpose as the incandescent bulb in the solution described above it simulates an electrical load drawing sufficient current to the dimmer switch.
You only need to install load resistors on the circuits feeding the turn signals.
I believe your sierra has two bulbs per side one for the running lamp one for the brake turn signal.
Why are installing load resistors necessary for led turn signal lights.
Per putco you would need 1 load resistor inline with the wiring harness feeding led bulb for a turn signal.
Obtain a set of easily installed resistors.
I recommend the putco p230004a 2 resistors.