* Under the hood in the fuse box: This is the most common location. The fuse box is usually located near the battery. The relay itself might be labeled, or you might need to consult your owner's manual or a wiring diagram to identify it. Look for a relay that's related to the A/C compressor or clutch.
* Inside the passenger compartment fuse box: Some Impalas have a secondary fuse box inside the car, often under the dash. This is less common for the AC relay but is a possibility.
To find it definitively:
1. Consult your owner's manual: This is the best place to start. It should have a diagram of the fuse box(es) and identify all the relays.
2. Use a wiring diagram: A wiring diagram for your specific year and model Impala will show the location and function of all components, including the AC relay. You can often find these online through automotive repair sites.
3. Visually inspect the fuse boxes: Carefully examine the relays in both fuse boxes under the hood and inside the cabin. Look for one that's the correct size and type for an AC relay (they often have markings that suggest this), or if you can't find a specific labeling, find one that seems to be related to the A/C system.
Important Note: Working with automotive electrical systems can be dangerous. If you are not comfortable working on your car's electrical system, it is best to take it to a qualified mechanic.
