If you own a 1986 Camaro and are experiencing issues with the fuel pump, it’s essential to have a wiring diagram to help you diagnose the problem. In this article, we will provide you with a detailed wiring diagram for your fuel pump and answer some frequently asked questions about the 1986 Camaro fuel pump.
Understanding the fuel pump wiring diagram
Before we get started with the wiring diagram, let’s understand how the fuel pump works. The fuel pump of the 1986 Camaro is electrically operated and is located in the fuel tank. When you turn the key to the on position, the fuel pump is activated, and it will run for two seconds to pressurize the fuel system. If the engine is started, the fuel pump will continue to run. If the engine is turned off or stalls, the fuel pump will stop running.
The fuel pump is controlled by the engine control module (ECM), which sends a signal to the fuel pump relay to turn the pump on or off. The fuel pump relay is located on the driver’s side firewall, and it’s essential to check this relay if you’re having fuel pump issues.
Now, let’s take a closer look at the wiring diagram:
The fuel pump relay circuit
The fuel pump relay circuit consists of four wires: power, ground, fuel pump relay control, and fuel pump. The power wire is fused and comes directly from the battery. The ground wire is connected to the ECM. The fuel pump relay control wire is connected to the ECM, and the fuel pump wire is connected to the fuel pump in the fuel tank.
In the wiring diagram, you can see that the fuel pump relay control wire is connected to pin A11 on the ECM. This wire sends a signal to the fuel pump relay to turn the fuel pump on or off.
| Wire Color | Circuit | Function |
|---|---|---|
| Orange | Fused Power | Directly from Battery |
| Black | Ground | Connected to ECM |
| Dark Green/White | Fuel Pump Relay Control | Connected to ECM (Pin A11) |
| Gray | Fuel Pump | Connected to Fuel Pump in Fuel Tank |
The fuel pump prime circuit
The fuel pump prime circuit is what turns the fuel pump on for two seconds when the key is turned to the on position. This circuit consists of three wires: power, ground, and fuel pump prime. The power wire is fused and comes directly from the battery. The ground wire is connected to the ECM. The fuel pump prime wire is connected to the fuel pump relay.
In the wiring diagram, you can see that the fuel pump prime wire is connected to pin B4 on the ECM. This wire sends a signal to the fuel pump relay to turn the fuel pump on for two seconds when the key is turned to the on position.
| Wire Color | Circuit | Function |
|---|---|---|
| Orange | Fused Power | Directly from Battery |
| Black | Ground | Connected to ECM |
| Dark Green/White | Fuel Pump Prime | Connected to Fuel Pump Relay |
Frequently asked questions
Q: How do I test the fuel pump relay?
A: To test the fuel pump relay, you can use a multimeter to check for continuity between the fuel pump relay control wire and the fuel pump wire. If there is continuity, the fuel pump relay is working correctly. If there is no continuity, you will need to replace the fuel pump relay.
Q: How do I test the fuel pump?
A: To test the fuel pump, you can use a fuel pressure gauge to check the fuel pressure. If the fuel pressure is within the manufacturer’s specifications, the fuel pump is working correctly. If the fuel pressure is low or non-existent, you will need to replace the fuel pump.
Q: What can cause the fuel pump to fail?
A: The fuel pump can fail due to a variety of reasons, including a clogged fuel filter, a faulty fuel pump relay, a damaged fuel pump wiring harness, or a failed fuel pump. It’s essential to diagnose the issue correctly to avoid unnecessary repairs.
Q: Can I replace the fuel pump myself?
A: While it’s possible to replace the fuel pump yourself, it’s a complex and potentially dangerous job. If you’re not experienced in working on cars, it’s best to leave this job to a professional mechanic.
Q: How much does it cost to replace the fuel pump?
A: The cost to replace the fuel pump can vary depending on the make and model of your car and the cost of parts and labor in your area. On average, you can expect to pay between $400 and $600 for the job.
Q: How often should I replace the fuel pump?
A: There is no set mileage or time frame for replacing the fuel pump. It’s best to follow the manufacturer’s recommendations and have regular maintenance checks to ensure that your fuel system is working correctly.
Conclusion
The 1986 Camaro fuel pump wiring diagram is essential for diagnosing fuel pump issues. By understanding how the fuel pump works and using the wiring diagram, you can identify and fix any issues with your fuel system. If you’re not experienced in working on cars, it’s best to leave fuel pump repairs to a professional mechanic to ensure your safety.
