The 1987 Ford Ranger was a popular truck for its durability and reliability. However, like any vehicle, it suffered from mechanical issues. One of the more common problems was fuel pump failure. In this article, we will dive into the 1987 Ford Ranger fuel pump wiring diagram, how it works, and what you can do to troubleshoot problems.
What is a Fuel Pump and How Does It Work?
A fuel pump is an essential component of a vehicle’s fuel system that transfers fuel from the gas tank to the engine. The fuel pump works by drawing fuel from the gas tank and sending it through a series of hoses and filters. Once the fuel is filtered, it is then sent through the fuel injection system or carburetor to the engine.
The fuel pump in a 1987 Ford Ranger is an electric pump that is located inside the fuel tank. It is powered by electricity from the truck’s battery and controlled by the fuel pump relay and inertia switch. The relay sends a signal to the fuel pump to turn on when the ignition is turned on, and the inertia switch shuts off the fuel pump in the event of an accident or sudden stop.
1987 Ford Ranger Fuel Pump Wiring Diagram
The fuel pump wiring diagram for a 1987 Ford Ranger is essential for understanding how the fuel pump system works. The wiring diagram is a schematic drawing of the electrical connections that make up the fuel pump system, including the fuel pump relay, fuel pump inertia switch, and the fuel pump itself.
The fuel pump wiring diagram for a 1987 Ford Ranger may vary depending on the truck’s configuration, but typically it includes a power source, a ground wire, a fuel pump relay, an inertia switch, and the fuel pump itself. The power source comes from the truck’s battery, and the ground wire is connected to the truck’s chassis.
Fuel Pump Relay
The fuel pump relay is usually located under the hood in the fuse box. It is responsible for sending a signal to the fuel pump to turn on when the ignition is turned on. The fuel pump relay is activated by the ignition switch and sends power to the fuel pump. The fuel pump relay is also responsible for shutting off the fuel pump in the event of an accident or sudden stop.
Inertia Switch
The inertia switch is a safety device that shuts off the fuel pump in the event of an accident or sudden stop. The inertia switch is usually located in the passenger compartment of the truck and is activated by a sudden jolt. Once the inertia switch is activated, it shuts off the fuel pump to prevent fuel from leaking out of the tank.
Fuel Pump
The fuel pump is an electric pump that is located inside the fuel tank. It is responsible for drawing fuel from the gas tank and sending it through a series of hoses and filters. Once the fuel is filtered, it is sent through the fuel injection system or carburetor to the engine. The fuel pump is controlled by the fuel pump relay and powered by the truck’s battery.
Common Fuel Pump Problems
There are several common problems that can occur with the fuel pump system in a 1987 Ford Ranger. Here are some of the most common problems:
Fuel Pump Relay Failure
If the fuel pump relay fails, the fuel pump will not receive the signal to turn on, and the engine will not start. To check if the fuel pump relay is working correctly, you can use a multimeter to test the voltage at the fuel pump relay’s terminals.
Inertia Switch Failure
If the inertia switch fails, it can prevent the fuel pump from turning on. You can test the inertia switch by using a multimeter to test the continuity between the switch’s two terminals.
Fuel Pump Failure
If the fuel pump fails, it will no longer draw fuel from the gas tank, and the engine will not start. You can test the fuel pump by using a multimeter to test the voltage at the fuel pump’s terminals.
Frequently Asked Questions
Q: How do I know if my fuel pump is bad?
A: If your fuel pump is bad, the engine will not start, or it will stall while driving. You can test the fuel pump by using a multimeter to test the voltage at the fuel pump’s terminals.
Q: What causes a fuel pump to fail?
A: Fuel pumps can fail for several reasons, including a clogged fuel filter, a faulty fuel pump relay or inertia switch, or a worn-out fuel pump motor.
Q: Can I replace the fuel pump myself?
A: While it is possible to replace the fuel pump yourself, it can be a tricky and time-consuming process. It is recommended that you have a professional mechanic perform the replacement.
Q: How much does it cost to replace a fuel pump?
A: The cost of replacing a fuel pump can vary depending on the make and model of your vehicle, as well as the cost of parts and labor. On average, the cost can range from $500 to $1,000.
Q: How often should I replace my fuel pump?
A: The lifespan of a fuel pump can vary depending on the make and model of your vehicle, as well as how often you drive it. However, most fuel pumps will last between 100,000 and 150,000 miles before needing to be replaced.
Conclusion
The fuel pump is an essential component of a vehicle’s fuel system, and understanding how it works and how to troubleshoot problems is crucial for any vehicle owner. By following the information in this article, you can identify and resolve fuel pump issues in your 1987 Ford Ranger. If you are unsure about any aspect of the fuel pump system or need professional assistance, it is recommended that you seek the help of a competent mechanic.
