* The blower motor resistor: This component controls the different fan speeds. If it's faulty, the blower might not work at all, or only work on the highest setting (if it has multiple speeds). This is a common point of failure and relatively inexpensive to replace. It's often located near the blower motor itself, sometimes under the dash.
* The blower motor switch: The switch itself could be bad. This is less common than the resistor, but possible. Testing this requires a multimeter to check for continuity.
* Wiring/Connectors: Look for broken, corroded, or loose wires in the wiring harness leading to the blower motor and the resistor. Check the connectors at both ends for corrosion or loose connections. A visual inspection is often sufficient, but a multimeter can help verify power is getting through.
* The blower motor itself: Although less likely if it stopped abruptly, the motor could have internally failed. This is more expensive to fix as it involves replacing the motor. You can sometimes hear a clicking or grinding sound if this is the problem.
* Relay (if applicable): Some vehicles use a relay to control the blower motor. A faulty relay could prevent the motor from receiving power. This requires identifying and checking the relay (often found in the fuse box).
Troubleshooting Steps:
1. Double-check the fuse: Even if it *looks* okay, use a multimeter to confirm it's not blown. Sometimes a hairline fracture isn't visible.
2. Inspect the wiring and connectors: Look for any obvious damage or corrosion.
3. Check the blower motor resistor: This is the most likely culprit after the fuse. Locate it (consult a repair manual or online forums for its location) and visually inspect it for signs of damage. Replacement is often straightforward.
4. Test the blower motor switch (if accessible): This is more involved and requires a multimeter.
5. Test the blower motor (if accessible): If you can access the motor itself, you can apply power directly to it (with caution!) to see if it runs. This should only be done if you're comfortable working with electricity. (Use a 12V power source and the appropriate connectors. Be careful of potential shorts.)
6. Check the relay (if applicable): Find the relay in your fuse box.
If you're not comfortable working with car electrical systems, it's best to take your car to a mechanic. Attempting repairs without proper knowledge could cause further damage. A repair manual specific to your 1994 Dodge Shadow will be invaluable in identifying the components and their locations.
