However, the most common locations are:
* Under the hood, in the power distribution box (fuse box): This is the most likely location. The power distribution box is usually located near the battery, often under a cover. Check the diagram on the inside of the cover to locate the fuel pump relay. The diagram should identify the relay by its function or by number.
* Inside the passenger compartment fuse box: Less common, but possible. This fuse box is usually located under the dashboard on the driver's side. Again, check the diagram inside the cover.
To find it definitively:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of all relays and fuses.
2. Use a wiring diagram: A wiring diagram specific to your 1999 Mercury Sable (including the engine size) will show the location and circuit of the fuel pump relay. You can find these online through automotive repair websites or manuals.
3. Search online forums: Search online forums specific to Mercury Sable owners. Someone may have already asked the same question and received a helpful answer with a picture.
Important Note: Before working with any electrical components, disconnect the negative terminal of your battery to prevent short circuits.
