Ford Ranger is a pickup truck manufactured by Ford Motor Company. The first model was introduced in 1983 and has since then become popular among truck enthusiasts. One of the most common problems experienced by Ranger owners is fuel pump wiring issues. In this article, we will be discussing the 1986 Ford Ranger fuel pump wiring diagram.
Understanding the Fuel Pump Wiring Diagram
The fuel pump wiring diagram is a schematic representation of the electrical connections between the fuel pump, the fuel pump relay, and the powertrain control module (PCM). The fuel pump relay is responsible for switching on and off the fuel pump, and the PCM monitors the fuel system for proper function.
The fuel pump wiring diagram helps identify the various components of the fuel system and how they are interconnected. It also helps diagnose fuel pump problems such as no start, intermittent start, or loss of power while driving.
Fuel Pump Relay
The fuel pump relay is a critical component in the operation of the fuel system. It controls the voltage to the fuel pump and is located in the engine compartment on the driver’s side fender well. It is a small, rectangular shaped box with four or five wires running into it.
The fuel pump relay is usually marked with the letter “C” or “FP” on the top of the box. To test the relay, you can use a multimeter to check if it is opening and closing correctly.
Fuel Pump Connector
The fuel pump connector is a plug that connects the fuel pump to the wiring harness. It is located near the fuel pump on the driver’s side of the engine compartment. The fuel pump connector consists of three wires which are color-coded for easy identification.
The black wire is the ground wire, the green wire is the power wire for the fuel pump, and the orange wire is the power wire for the fuel gauge. It is important to ensure that the fuel pump connector is properly connected and secured to avoid fuel system problems.
Fuel Pump Wiring Harness
The fuel pump wiring harness is the bundle of wires that connects the fuel pump to the fuel pump relay and the PCM. It is located in the same area as the fuel pump connector and is usually covered by a protective sheath.
The fuel pump wiring harness consists of several wires that are color-coded for easy identification. These wires include the power wire for the fuel pump, the ground wire, the wire that connects the fuel pump relay to the PCM, and the wire that connects the fuel level sensor to the PCM.
PCM Wiring Harness
The PCM wiring harness is the bundle of wires that connects the PCM to the vehicle’s sensors and fuel systems. It is located under the hood and extends to the various sensors and components located throughout the vehicle.
The PCM wiring harness consists of several wires that are color-coded for easy identification. These wires include the fuel pump relay wire, the fuel pump power wire, the fuel level sensor wire, and the ignition switch wire.
Common Fuel Pump Problems
The fuel pump system can experience several problems that can affect its performance or cause it to fail. Here are some of the most common fuel pump problems experienced by Ford Ranger owners:
No Start
If your Ford Ranger fails to start, it could be due to a problem with the fuel pump system. A no start condition can be caused by a faulty fuel pump, fuel pump relay, or wiring harness. You can diagnose a no start condition by checking fuel pressure, testing the fuel pump relay, and inspecting the wiring harness for damage or loose connections.
Intermittent Start
An intermittent start condition can be caused by a faulty fuel pump relay, poor electrical connections, or a failing fuel pump. You can diagnose an intermittent start condition by checking the fuel pump relay, inspecting the wiring harness for damage or loose connections, and testing the fuel pressure when the engine is running correctly.
Loss of Power While Driving
If your Ford Ranger experiences a loss of power while driving, it could be due to a fuel pump problem. A failing fuel pump can cause the engine to lose power and eventually stall. You can diagnose a loss of power condition by checking for fuel pressure, inspecting the fuel pump relay, and testing the wiring harness for loose connections or damage.
Conclusion
If you’re experiencing fuel system problems with your 1986 Ford Ranger, the fuel pump wiring diagram can be a helpful tool in diagnosing and resolving these problems. It is important to ensure that all connections are properly secured and all components are functioning correctly to avoid fuel system issues that can cause damage to your vehicle or even put your safety at risk.
FAQ
Question | Answer |
---|---|
What is a fuel pump wiring diagram? | A fuel pump wiring diagram is a schematic representation of the electrical connections between the fuel pump, fuel pump relay, and PCM in a vehicle’s fuel system. |
Where is the fuel pump relay located on a Ford Ranger? | The fuel pump relay is located in the engine compartment on the driver’s side fender well. |
What are some common fuel pump problems? | Some common fuel pump problems include no start, intermittent start, and loss of power while driving. |
How do I diagnose a fuel pump problem? | You can diagnose a fuel pump problem by checking fuel pressure, testing the fuel pump relay, and inspecting the wiring harness for damage or loose connections. |
What should I do if I’m experiencing fuel system problems? | If you’re experiencing fuel system problems, it’s important to have your vehicle inspected by a qualified mechanic to diagnose and resolve the issue. |