1. Check the Fuses: Start with the easiest fix. Consult your owner's manual to locate the fuse(s) for the blower motor and check for a blown fuse. Replace if necessary.
2. Check the Blower Motor Resistor: The resistor controls the fan speeds. A faulty resistor can cause the blower to stop working altogether, or only work on the highest setting (if at all). This is a common failure point on Explorers. The resistor is usually located behind the glove box or under the dash. Accessing it may require removing the glove box. Inspect it visually for burn marks or obvious damage. A simple multimeter test can confirm its functionality (check online for specific instructions for your Explorer's resistor).
3. Check the Blower Motor Switch: The switch itself could be faulty. This is less common than the resistor but possible. You can try tapping on the switch gently while someone tries the fan – a temporary improvement points to the switch as the culprit. Replacement is often the solution here.
4. Check the Blower Motor: This is the most involved step. The blower motor itself could be burned out or have seized bearings. This requires accessing the blower motor (usually under the dash). You'll need to disconnect the electrical connector and possibly remove some components to reach it. Once removed, you can test it directly with 12V power (using caution) to see if it spins. If it doesn't spin freely, it's likely faulty and needs replacement.
5. Check Wiring and Connections: Inspect all wiring leading to the blower motor, resistor, and switch for breaks, loose connections, or corrosion. Clean or repair as needed.
6. Check for Low Voltage: A weak battery or other electrical issues could lead to insufficient power for the blower. Test the battery voltage and the voltage at the blower motor connector to verify you're getting a sufficient 12V supply.
Important Notes:
* Safety First: Disconnect the negative battery terminal before working on any electrical components in your vehicle.
* Owner's Manual: Consult your 1993 Ford Explorer owner's manual for specific diagrams and instructions.
* Professional Help: If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic. Misdiagnosis or incorrect repairs can lead to further damage.
Working on car electrical systems can be challenging. If after checking the fuses and resistor you're not comfortable proceeding, a mechanic should be consulted. The steps above provide a guide, but your specific situation may require additional troubleshooting.
