You’ll need LED Load Resistors or an LED Flasher Relay which will work on any vehicle and can be connected across the turn signal bulbs or License Plate Lights to simulate the load of a regular filament bulb (2 Amp load). One LED resistor is required for each turn signal bulb or each license plate light bulb. Here is an example of how 1156 and 1157 resistors are wired and uses the same concept for 3156/3157.