Blower motor, resistor: how it works, symptoms, problems, testing Aug 01, 2021Toyota Corolla 2009-2013; Chevrolet Cruze 2011-2015; Mazda 3 2010-2013; BMW 3-series 2006-2011; It's located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. In this diagram, the fan switch is set to the speed "1", so the blower motor current is reduced by three