How to Install a Load Resistor for LED Lights (The Theory, Wiring Diagrams, etc)

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For more information, see:

https://do-it-up.com/vehicles/wiring/...

Replacing a filament light bulb with an LED light bulb, can sometimes cause the vehicles electronics (or turn signal relay) to flash the turn signals faster than normal (hyper flash). The CAN bus system (vehicles electronics) can also think there is a bulb failure.

Installing load resistors will mimic the filament light bulbs load on the system. The turn signals will flash at the correct speed, and the CANbus system should also thinks the light bulb load is correct and not report any errors.

To add a load resistor to a turn signal (indicator) it has to be wired into each LED light bulb in parallel. I.e. The load resistor goes across the light bulb connections, between the supply and ground.

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? In which case you only need 2 x load resistors).

Load resistors can generate lots of heat, so position carefully.