* Blown Fuses: This is the most common and easiest to check. The fuse box is usually under the hood or dashboard. Check the fuses specifically designated for the headlights (often labeled "Headlights," "HL," or similar).
* Bad Headlight Bulbs: The bulbs themselves may have burned out. This is also relatively easy to check and replace.
* Headlight Switch: The switch controlling the headlights might be faulty. It could be broken internally or have a loose connection.
* Wiring Issues: Worn or damaged wiring, corroded connections, or a broken wire in the harness could interrupt the electrical circuit. This often requires tracing the wires.
* Multi-Function Switch (Turn Signal/Wiper Switch): On some vehicles, this switch controls the headlights. A problem here would impact more than just the headlights.
* Relay Problems: A faulty headlight relay would prevent the power from reaching the headlights.
* DIMMER switch: A faulty dimmer switch can affect headlight operation.
* Ignition Switch: In rare cases, a failing ignition switch could affect the power to the headlights.
* Body Control Module (BCM): In more modern vehicles, a BCM controls various electrical functions. A faulty BCM could affect the headlights, but this is less likely in a 1994 model.
To troubleshoot, start with the simplest possibilities: checking the fuses and bulbs. If those are fine, further investigation (potentially involving a multimeter to test voltage and continuity) or a visit to a mechanic might be necessary.
