12V LED Load Resistor. The dummy load resistor is designed to be used on vehicles that have electronic components that are not LED compatible. This is because the LEDs draw milliamps which are smaller than an amp which confuses some electronic systems. The optional load resistor simulates the current draw of the indicator bulb and enables the flasher unit to operate correctly. IMPORTANT NOTICE: Resistor must be fitted to a metal surface as temperate can reach up to 170°C.