Where are the headlamp relays on a 1999 Chevrolet Cavalier?

The headlamp relays on a 1999 Chevrolet Cavalier are typically located in the underhood fuse box (also called the power distribution center). However, it's not guaranteed they're relays; some years might use solid-state switching instead.

To find them, you'll need to:

1. Locate the underhood fuse box: This is usually a black plastic box, often near the battery. The cover should have a diagram showing the fuse and relay positions.

2. Consult the fuse box diagram: The diagram will show the location of the headlamp relays (they'll likely be labeled "Headlamp" or something similar). Pay close attention to the diagram as relay locations can vary slightly between models and years.

3. Identify the relays: Relays are typically square or rectangular components with several terminals.

If you can't find them using the diagram, a detailed wiring diagram for your specific 1999 Chevrolet Cavalier (obtained from a repair manual, online resources like Haynes or Chilton, or a trusted online parts store) would be necessary. The diagram will show the specific location and color codes of the wires involved. Searching for "1999 Chevrolet Cavalier wiring diagram" might yield good results.