Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Under normal conditions, when the function selector switch is in any position except OFF, the blower motor switch completes the circuit 261 (OG/BK) from the blower motor through either the blower motor resistor, or directly to ground.