* Under the hood in the Power Distribution Center (PDC): This is the most common location. The PDC is a large fuse and relay box, typically located near the battery. You'll need to consult your owner's manual or a wiring diagram to identify the specific relay. The relay itself might be labeled, or you might need to trace wires to confirm.
* Inside the passenger compartment fuse box: Less common, but possible. This is usually located under the dashboard, often near the steering column. Again, a wiring diagram or owner's manual is crucial for identification.
To find it definitively:
1. Consult your owner's manual: This is the best starting point. It should have a diagram showing the fuse and relay box locations and layouts.
2. Use a wiring diagram: A wiring diagram specific to your 1999 Dodge Grand Caravan will pinpoint the relay's location and number. You can find these online through various automotive repair websites (often for a fee) or at an auto parts store.
3. Use a multimeter: If you're comfortable working with electricity, you can use a multimeter to test relays in the fuse boxes until you find one that controls the fuel pump circuit. Caution: Always disconnect the negative battery terminal before working with electrical components in your vehicle.
Without access to your specific vehicle's documentation, providing a precise location is impossible. The above information should help you locate it using the recommended resources. Remember safety first; if you're not comfortable working on your car's electrical system, take it to a qualified mechanic.
