* Under the hood in the fuse box: This is the most common location. The fuse box is typically located near the battery, often under a cover. Look for a diagram on the inside of the fuse box cover to identify the fuel pump relay.
* Inside the cab, under the dash: Less common, but possible on some models. You might find it near the other relays and fuses inside the dashboard.
To find it definitively:
1. Consult your owner's manual: This is your best resource. It should have a diagram showing the location of all relays and fuses.
2. Look for a wiring diagram: A wiring diagram for your specific year, engine, and model will precisely show the relay location. You can often find these online through sites like Haynes or Chilton manuals (often for purchase), or sometimes free versions through forums dedicated to classic Dodge trucks.
3. Trace the fuel pump wiring: This is the most labor-intensive method. Follow the wiring harness from the fuel pump toward the front of the truck. The wiring should lead you to the relay.
Remember to disconnect the negative terminal of your battery before working with any electrical components to avoid short circuits. Be careful not to damage any wires or connectors.
