However, there are a few other possibilities to consider before you definitively say it's the switch:
* Wiring Issues: Check the wiring harness connected to both the blower motor resistor and the blower motor switch. Look for any broken, frayed, or corroded wires. A simple visual inspection might reveal the problem. A multimeter can confirm continuity in the circuits.
* Blower Motor: While less likely if high speed works, a failing blower motor *could* exhibit this symptom. The motor's internal windings might be degrading, only allowing sufficient current to flow at high speed.
* Poor Ground Connection: A poor ground connection can affect the operation of the entire system. Ensure the ground connection for the blower motor and its related components is clean and secure.
Troubleshooting Steps:
1. Visually Inspect Wiring: Carefully examine the wiring harness connecting the switch, the resistor, and the blower motor.
2. Check Ground: Inspect the ground connection(s) for the blower motor and the blower motor resistor. Clean any corrosion.
3. Test with a Multimeter (Advanced): If you're comfortable using a multimeter, you can test the voltage at different switch positions to see if the correct voltage is reaching the resistor and then the motor. This requires some electrical knowledge and a wiring diagram for your specific vehicle year. You can find wiring diagrams online (search for "2000 Chrysler Sebring Convertible wiring diagram").
4. Replace the Switch: If the wiring and ground appear good and you've eliminated other possibilities, replacing the blower motor switch is the next logical step. It's relatively inexpensive compared to extensive electrical diagnostics.
In summary, the switch is a strong suspect, but thorough checking of the wiring and ground is essential before committing to replacing it. If you're not comfortable working with automotive electrical systems, it's best to consult a qualified mechanic.
