1. Fuses: This is the *most likely* culprit. Check the fuse box (usually under the hood or inside the car, often near the steering column) for blown fuses related to the headlights. Consult your owner's manual to locate the correct fuses. They'll likely be labeled "headlights," "low beam," "high beam," or similar. Replace any blown fuses with fuses of the *same amperage*.
2. Headlight Switch: Make sure the headlight switch itself isn't malfunctioning. Try turning the switch multiple times. A faulty switch can be internally broken and not making proper contact.
3. Bulbs: While less likely if *both* headlights stopped working simultaneously, it's possible both headlight bulbs burned out at the same time. Inspect the bulbs themselves. If they're burned out, replace them with the correct type. Be careful not to touch the glass part of the bulb when handling it.
4. Relays: Headlight circuits often use relays to protect the switch and wiring. A faulty relay can prevent the headlights from working. You'll need to locate the headlight relays (often in the fuse box or a separate relay center) and test them (often using a multimeter) or replace them. Again, consult your owner's manual or a wiring diagram.
5. Wiring and Connections: Check the wiring harness leading to the headlights for any damaged, corroded, or loose connections. Look closely at the connectors at the headlights themselves, and also where the wires connect to the switch and relays. Corrosion is a common issue, especially in older cars. Clean any corrosion with a wire brush and electrical contact cleaner.
6. Multi-Function Switch (if applicable): Some vehicles have a multi-function switch that controls lights, wipers, etc. A problem here could affect headlights.
7. Grounding: A poor ground connection can prevent the headlights from working. Check the ground wires for corrosion or loose connections.
8. Dimmer Switch (if applicable): If the dimmer switch is malfunctioning, it may prevent the headlights from working properly.
Before you start:
* Safety First: Disconnect the negative battery terminal before working on the electrical system to prevent shocks or short circuits.
* Owner's Manual: Your owner's manual is your best friend. It will provide diagrams and specifications for your car's electrical system.
* Wiring Diagram: A wiring diagram specific to your 1992 LeBaron convertible is very helpful for tracing circuits. These can sometimes be found online.
If you've checked all these items and the headlights still don't work, you'll likely need to consult a qualified auto mechanic or electrician for further diagnosis. The problem might be a more complex electrical fault, such as a damaged wire in the harness or a problem with the headlight control module.
