Resistors & Capacitors

It's common when upgrading your lighting to HID or LED because the vehicle is programmed to work with incandescent filament-style bulbs. When you change to HID or LED sometimes you have to mimic the original characteristics of the stock bulb in order for the circuit to function properly after upgrading. These different resistor products use the same values as the original bulbs, and install in-line with the new bulb to trick the computer into functioning properly.