Where is the blower motor resistor on a 2005 ford five hundred?

The blower motor resistor on a 2005 Ford Five Hundred is located behind the glove box. To access it, you'll need to remove the glove box. This usually involves removing a few screws and possibly some clips. Once the glove box is out, the resistor should be visible. It's a small, rectangular black box often attached to the HVAC housing.