* Under the hood in the Power Distribution Box (PDB): This is the most common location. The PDB is typically located near the battery, often attached to the inner fender. You'll need to open the PDB cover and consult the diagram on the inside cover to locate the fuel pump relay. The diagram will show the relay's location and often its number.
* Inside the passenger compartment fuse box: Less common, but possible. This fuse box is usually located under the dashboard, often near the steering column. Again, check the diagram inside the fuse box cover.
To find it definitively:
1. Consult your owner's manual: This is the best place to start. It should have a diagram showing the location of all fuses and relays.
2. Look for a relay diagram: The inside cover of the underhood power distribution box and/or the fuse box inside the cab should have a diagram. Look for a relay labeled "Fuel Pump" or a similar designation. Sometimes the fuel pump relay is integrated into a larger module.
3. Use a multimeter: If you can't find it visually, you can use a multimeter to test relays in the fuse boxes until you find one that controls the fuel pump circuit. (Caution: Consult a wiring diagram to do this safely; incorrect testing can damage your vehicle's electrical system.)
Remember that safety is paramount. Disconnect the negative battery terminal before working on any electrical components.
