To find the relevant fuses and relays, you need to consult your owner's manual. The manual will have a diagram showing the fuse box location(es) (there might be one under the hood and another inside the car) and a legend identifying each fuse's purpose. Look for fuses related to "headlights," "parking lights," or possibly "headlamp relay." The relay itself may be the culprit, not a blown fuse.
Without the owner's manual, it's difficult to give precise locations. However, common locations for fuse boxes in 1990s Buicks include:
* Under the hood: Often near the battery.
* Inside the car: Common places are under the dashboard (often near the steering column) or in the glove compartment.
Before you start checking fuses, consider these possibilities:
* Headlight switch: Check if the headlight switch itself is malfunctioning.
* Wiring: Damaged or corroded wiring can cause headlight failure. This is more likely if only one headlight is out.
* Relay: A bad relay can prevent the headlights from working. Locating and testing or replacing the relay is often crucial.
In short: Get your owner's manual. It's your best resource. If you don't have it, you can often find a downloadable version online through a Buick parts website or a site specializing in car manuals. If you can't find the manual, a qualified mechanic can diagnose the problem quickly.
