* Under the hood in the fuse box: This is the most common location. The fuse box is typically located near the battery. Look for a box with numerous relays and fuses. The relay itself may be labeled, or you might need to consult your owner's manual or a wiring diagram to identify it specifically. Look for a relay that's connected to the cooling fans, or one that seems sized appropriately for that task.
* Inside the passenger compartment fuse box: Less common, but possible, especially if there's a secondary relay for a higher-speed fan stage. Again, your owner's manual or a wiring diagram is essential here.
To find the exact location:
1. Consult your owner's manual: This is the best starting point. It should have a diagram of the fuse box(es) and identify the cooling fan relay.
2. Use a wiring diagram: A wiring diagram specific to your 2000 Chevy Impala (consider the engine size as this might affect the setup) will definitively show you which relay controls the cooling fans and its location. You can find these online through repair manuals (like Chilton or Haynes) or sometimes freely available online through automotive forums dedicated to Impalas.
3. Visual inspection: Carefully examine both fuse boxes (under the hood and inside the car, if applicable). Look for relays that are large enough to handle the power required to run the cooling fans. You might even find a relay labeled "Cooling Fan" or similar.
Important Note: If you're unsure about working on your car's electrical system, it's best to have a qualified mechanic perform the diagnosis and repair. Incorrectly working with relays or wiring could damage your car's electrical system.
