* In the underhood fuse box (power distribution center): This is the most common location. The fuse box is usually located under the hood, often near the battery. Check the diagram on the inside of the fuse box lid. It should list the relay's location and function.
* In the passenger compartment fuse box: Less common, but possible. This fuse box is usually located inside the vehicle, often under the dashboard. Again, consult the diagram on the inside of the fuse box lid.
* Standalone relay: In some rare cases, the relay might be located elsewhere, perhaps mounted to a nearby component.
To find it, you'll need to:
1. Consult your owner's manual: This is your best bet. The manual should have a diagram of the fuse and relay boxes, clearly identifying the fuel injector relay.
2. Use a repair manual: A Haynes or Chilton repair manual for your specific year and model will have detailed diagrams and information on the location of all relays.
3. Search online forums: Specific Buick Riviera forums (like those on enthusiast websites) may have posts from owners who have located the relay on their vehicles. Be sure to specify the year and supercharged model.
4. Use a multimeter: If you're comfortable with basic electrical testing, you can trace the wiring from the fuel injectors to find the relay. This is a more advanced method and requires caution to avoid electrical shock.
Remember to always disconnect the negative battery terminal before working with any electrical components. If you're not comfortable working with automotive electrical systems, it's best to take your vehicle to a qualified mechanic.
