1. Consult your owner's manual: This is the best source for the exact location for your specific year and model.
2. Use a repair manual or online resources: Websites like RepairPal or Haynes manuals often have diagrams showing the location for your specific vehicle. Search for "[your year] Ford Explorer blower motor resistor location."
3. Look behind the glove box: This is the most common location. You'll likely need to remove the glove box to access it. There may be screws or clips holding it in place.
4. Check under the dashboard: If it's not behind the glove box, look carefully under the dashboard on the passenger side. You may need a flashlight and possibly some tools to get a good view.
Caution: Disconnecting the battery's negative terminal before working near the blower motor resistor is always recommended to prevent electrical shocks. Also, be careful when removing components to avoid damaging any wires or other parts.