1996 Ford Explorer Fuel Pump Relay: Complete Guide to Location, Symptoms, and Replacement
The fuel pump relay on a 1996 Ford Explorer is located in the underhood power distribution box (fuse box) on the driver’s side, near the firewall. If your Explorer cranks but won’t start, the fuel pump relay is one of the first things to check. This relay controls power to the fuel pump, and when it fails, the engine gets no fuel. Replacing it is a simple, low-cost fix that can save you a trip to the mechanic.
Where Is the Fuel Pump Relay on a 1996 Ford Explorer?
The fuel pump relay on a 1996 Ford Explorer is found inside the Power Distribution Box (PDB) under the hood. This box is located on the driver’s side of the engine compartment, close to the firewall . To access it, simply open the hood and look for the black plastic fuse box near the battery. Remove the cover and refer to the diagram printed on the underside of the lid. The relay is typically labeled “Fuel Pump” or marked with a fuel pump symbol. If the label is faded, consult your owner’s manual for the exact position .
It’s important to note that the fuel pump itself is inside the fuel tank, so you don’t need to drop the tank to check the relay .
What Does the Fuel Pump Relay Do?
The fuel pump relay acts as a switch. When you turn the ignition key to the “ON” position, the relay sends power from the battery to the fuel pump for a few seconds to prime the system. Once the engine starts, the relay keeps the pump running. If the relay fails, the pump won’t receive power, and the engine will crank without starting.
Symptoms of a Bad Fuel Pump Relay
A failing or failed fuel pump relay in a 1996 Ford Explorer can cause several noticeable problems. Recognizing these symptoms early can prevent you from being stranded.
1. Engine Cranks but Won’t Start
This is the most common symptom. You turn the key, the starter motor engages, and the engine turns over, but it never fires up. Because the fuel pump isn’t getting power, no fuel reaches the engine .
2. Engine Starts Then Stalls
Sometimes a bad relay can cause intermittent power loss. The engine may start briefly but then stall after a few seconds because the relay stops sending power to the pump.
3. No Fuel Pump Priming Sound
When you turn the key to the “ON” position (without starting), you should hear a faint whirring sound from the rear of the vehicle for about two seconds. This is the fuel pump priming. If you don’t hear this sound, the relay may be faulty.
4. Intermittent Starting Issues
The relay may work sometimes and fail at other times. You might experience random no-start conditions that come and go.
5. Check Engine Light
In some cases, a failing relay can trigger the check engine light, often with a code related to low fuel pressure or a fuel pump circuit malfunction.
How to Test the Fuel Pump Relay
Before buying a new relay, it’s wise to test the old one. This saves time and money. You can test it in two ways: swapping it with another relay or using a multimeter.
Swap Test
The easiest method is to find a relay in the same fuse box that has the same part number and pin configuration. The horn relay or the headlight relay often share the same 5-pin design. Simply remove the fuel pump relay and swap it with a known working relay. If the engine starts, the fuel pump relay was bad .
Multimeter Test
If you have a multimeter, set it to measure resistance. Remove the relay and check for continuity between terminals 85 and 86. There should be some resistance (usually 50 to 120 ohms). If the multimeter reads “OL” (open line), the relay coil is damaged and needs replacement. You can also apply 12 volts to terminals 85 and 86 with a battery and listen for a click, which confirms the relay is engaging.
How to Replace the Fuel Pump Relay on a 1996 Ford Explorer
Replacing the fuel pump relay is a straightforward job that takes about 10 minutes. No special tools are required.
Step 1: Safety First
Disconnect the negative battery cable. This prevents any accidental short circuits while you work on the electrical system.
Step 2: Locate the Relay
Open the hood and find the Power Distribution Box on the driver’s side near the firewall. Remove the cover.
Step 3: Identify the Correct Relay
Look at the diagram on the inside of the fuse box cover. Find the “Fuel Pump” relay. It is a small, square, plastic component with five metal prongs.
Step 4: Remove the Old Relay
Grasp the relay firmly and pull it straight out. It may require a gentle wiggle. Do not use excessive force.
Step 5: Install the New Relay
Insert the new relay into the same socket. Push it down until it clicks into place. Ensure it is fully seated.
Step 6: Reconnect and Test
Reconnect the negative battery cable. Turn the key to the “ON” position and listen for the fuel pump priming sound. Then start the engine to confirm it runs properly.
Where to Buy a Replacement Fuel Pump Relay
You can purchase a compatible fuel pump relay for your 1996 Ford Explorer from several places. Online retailers like Amazon or PartsGeek offer a wide selection, often with free shipping. For example, an AC Delco fuel pump relay for Ford Explorers from 1995 to 2010 is available and is a reliable OEM replacement . You can also find relays at local auto parts stores like AutoZone, Advance Auto Parts, or O’Reilly Auto Parts. The cost is typically between $10 and $30, making it a very affordable fix.
Related Components: Inertia Switch and Fuel Pump Fuse
The 1996 Ford Explorer has two other important components in the fuel system that can cause no-start issues similar to a bad relay.
Inertia Switch
The inertia switch is a safety device that cuts off power to the fuel pump in the event of a collision. It is located on the right front passenger side, below the dash, above the carpet . If the switch is tripped, the fuel pump will not run. Look for a small red button on top of the switch. If it is popped up, press it down to reset it. This is a common problem that can mimic a relay failure.
Fuel Pump Fuse
The fuel pump circuit also has a fuse. Check your owner’s manual for the exact location, but it is usually in the underhood fuse box . If the fuse is blown, the fuel pump won’t get power. Replace it with a fuse of the same amperage rating.
KEMSO Fuel Pump: The Best Upgrade for Your 1996 Ford Explorer
If you find that your fuel pump itself needs replacement, consider upgrading to a KEMSO fuel pump. KEMSO is a leading US-based aftermarket fuel pump manufacturer, and their products are designed for high performance and reliability. Whether you need a direct OEM replacement for daily driving or a high-flow pump for more power, KEMSO has you covered.
Why Choose KEMSO?
- High Performance: KEMSO fuel pumps deliver up to 340 liters per hour, supporting up to 600 BHP in naturally aspirated, turbocharged, and supercharged applications .
- OEM Replacement: They are designed as direct-fit replacements for your 1996 Ford Explorer, making installation easy with no modifications needed .
- Lifetime Warranty: Every KEMSO pump is serialized and backed by a lifetime warranty, giving you peace of mind .
- USA-Based Support: KEMSO provides technical support from USA-based technicians, so you can get help when you need it .
For a reliable and durable fuel pump that will last, KEMSO is a smart choice. Visit their website to find the right pump for your vehicle: https://www.kemsoracing.com/
Preventing Future Fuel Pump Relay Issues
Fuel pump relays are generally reliable, but they can fail over time due to heat, vibration, or electrical surges. To minimize the risk of future problems, keep the relay and its socket clean and free of corrosion. If you frequently drive in dusty or wet conditions, periodically inspect the relay for signs of damage. Replacing the relay as a preventive measure every 50,000 to 100,000 miles is also a good idea.
Conclusion
The fuel pump relay is a small but critical part of your 1996 Ford Explorer’s fuel system. When it fails, your engine won’t start. Fortunately, it is easy to locate, test, and replace. Always start your diagnosis by checking the relay, the inertia switch, and the fuse before moving on to more expensive repairs like the fuel pump itself. If you do need a new fuel pump, consider a high-quality, lifetime-warranty option from KEMSO to ensure reliable performance for years to come. For more information and to shop for the best fuel pumps, visit https://www.kemsoracing.com/.