* Under the hood, in the Power Distribution Box (PDB): This is the most common location. The PDB is usually located near the battery, often on the passenger side fender apron. You'll need to open the PDB cover (often held on by screws) and consult a wiring diagram or the relay panel's legend to locate the correct relay. It's often labeled, but sometimes you need to trace wires to be sure.
* Inside the car, under the dashboard: This is less common but possible on some 1988 Mustangs. This location is much harder to access and requires more disassembly.
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 relays and fuses.
2. Use a wiring diagram: A wiring diagram specific to your 1988 Mustang will clearly show the fuel pump relay's location and circuit. You can often find these online through Mustang forums or repair manuals.
3. Check online forums: Search for "1988 Mustang fuel pump relay location" on forums dedicated to Ford Mustangs. Other owners have likely documented the location with photos.
Without a wiring diagram specific to your car's options, it's impossible to pinpoint the exact location definitively. Remember to always disconnect the negative battery terminal before working with electrical components.
