LED retrofit bulbs are more energy efficient than traditional incandescent bulbs, for example, requiring only 15-35 watts vs. the traditional 55 watts or below. This leads the CANbus system to believe that your lights might exceed its operational range; the resistor can increase power consumption to deceive the CANbus and prevent flickering. Resistors are low cost and easy to use; they generate a significant amount of heat, so be sure to install them on metal components, away from rubber parts.

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