* Underhood fuse box: This is the most common location. The underhood fuse box is typically located near the battery. The relay itself might be labeled, or you may need to consult your owner's manual or a wiring diagram to identify it. Look for a relay related to the fuel pump, fuel injection, or possibly the PCM (powertrain control module).
* Passenger compartment fuse box: Less common, but possible. This fuse box is usually located under the dashboard on the driver's side or passenger's side. Again, consult your owner's manual or a wiring diagram to pinpoint the correct relay.
To find the correct relay:
1. Consult your owner's manual: This is the best starting point. It will have a diagram of the fuse and relay boxes, showing the location of each component.
2. Use a wiring diagram: A wiring diagram specific to your 2000 Chevy Express van (including the engine type) will show you exactly where the fuel pump relay is located and its connections. These can be found online through automotive repair sites or purchased from auto parts stores.
3. Look for labels: Even without a diagram, the relays in the fuse boxes might have labels. Look for anything mentioning "fuel pump," "fuel injection," or similar terms.
4. Use a multimeter: If you're comfortable with basic electrical work, you can use a multimeter to test the relays and identify the fuel pump relay by its circuit. This is the most advanced method and requires caution.
Remember to always disconnect the negative battery terminal before working on any electrical components in your vehicle. If you are unsure about any of these steps, it's best to consult a qualified mechanic.
