Where is the headlight relay located on 1998 Buick Century?

The headlight relay location on a 1998 Buick Century isn't standardized across all trim levels and options. It's most likely in the underhood fuse block, but not always. Some models might have them in the passenger compartment fuse box.

To find it definitively:

1. Consult your owner's manual: This is the best resource. The manual will have a diagram showing the location of all fuses and relays.

2. Check the underhood fuse box: This is the most common location. The box usually has a cover with a diagram showing what each fuse and relay controls. Look for a relay labeled "headlights," "headlamp," or something similar. Sometimes the diagram uses symbols rather than words.

3. Check the interior fuse box (if applicable): This is usually located under the dashboard, often near the steering column or glove compartment. Again, consult the diagram on the fuse box cover.

4. Use a multimeter (optional but helpful): If you can't find it visually, you can use a multimeter to test the continuity of the headlight circuit. This will help you trace the wire back to the relay. Caution: Disconnect the negative battery terminal before doing this to prevent electrical shocks.

If you're unsure about working with electrical components in your car, it is best to consult a qualified mechanic. Improper handling of car electrical systems can be dangerous.