The flasher relay switch for a 2003 Buick Rendezvous is located in the fuse block under the hood.
Here are the steps on how to locate the flasher relay switch:
1. Open the hood of your 2003 Buick Rendezvous.
2. Locate the fuse block cover under the hood, near the battery.
3. Remove the fuse block cover by pressing the release tab and lifting it up.
4. Once the fuse block cover is removed, you will see a diagram of the fuse and relay locations.
5. Locate the flasher relay switch, which is usually labeled as "FL" or "FLASHER."
6. The flasher relay switch is usually a small, black or gray box with a few wires connected to it.
7. Once you have located the flasher relay switch, you can replace it if necessary.
