The blower motor resistor, also known as the blower output or final stage switch, is located on the passenger side of the IHKA housing inside the dashboard. To access it, remove the glove compartment and the right footwell trim panel, followed by the footwell air duct and the fresh air/recirculation motor. To remove the blower motor resistor pack from the IHKA housing, first remove the mounting screws, then detach the electrical harness connector, and press the retaining clip away from the switch to release it. Installation is the reverse of removal, ensuring that the electrical harness is routed as it was before and that guides and clips are aligned correctly.