* Blown Fuse: This is the *most common* and easiest to check first. Your owner's manual will show you the fuse box location and diagram, indicating which fuse(s) control the headlights. A blown fuse will be visibly broken (a thin wire inside will be severed). Replace it with a fuse of the *same amperage*.
* Headlight Switch: The switch itself could have failed internally. This is a relatively common failure point in older vehicles. The switch is responsible for completing the circuit to power the headlights.
* Wiring Problem: A loose connection, corroded wire, or broken wire in the headlight circuit could interrupt power to both lights. This often happens near the headlight switch or at the connectors near the headlights themselves. Inspecting the wiring harness is more involved.
* Relay (if applicable): Some vehicles use relays to control the headlights. A failed relay can cut power to both headlights. Checking the relay requires some electrical knowledge and potentially a multimeter.
* Dimming Switch/Rheostat: This less likely culprit can interrupt the headlight circuit if it's faulty.
* Battery/Alternator: While less likely to cause *only* the headlights to fail, a severely drained battery or a failing alternator could cause low voltage, leading to the headlights not working. Check your battery voltage.
Troubleshooting Steps:
1. Check the fuses: This is the absolute first thing to do.
2. Inspect the wiring: Look for any obvious damage, corrosion, or loose connections in the wiring harness leading to and from the headlights. Pay close attention to the connections at both the headlight switch and the headlights themselves.
3. Test the headlight switch: This requires some electrical testing (multimeter). You'll need to check continuity and voltage at various points in the circuit while operating the switch.
4. Check the battery voltage: Ensure the battery is properly charged.
If you're not comfortable working with car electrics, it's best to take your Corsica to a qualified mechanic. Attempting repairs without proper knowledge can lead to further damage or injury.
