Do you have a 97 Blazer and are experiencing issues with your fuel pump? Look no further! In this article, we will discuss the wiring diagram for the fuel pump and provide troubleshooting tips to help you diagnose and fix the issue.
Overview of the Fuel Pump System
The fuel pump is an essential component of your vehicle’s fuel system. Its main function is to pump fuel from the gas tank to the engine at a consistent pressure. The 97 Blazer fuel pump is an electric pump located in the fuel tank. It is controlled by the powertrain control module (PCM) through the fuel pump relay. The relay is activated when the ignition switch is turned on, sending power to the fuel pump.
There are a few components that are part of the fuel pump system, including the fuel pump relay, fuel pump fuse, fuel pump connector, and fuel pump itself. These components work together to ensure the fuel pump is receiving power and functioning correctly.
Wiring Diagram for the Fuel Pump
Now, let’s take a look at the wiring diagram for the 97 Blazer fuel pump. See the diagram below for reference:
| Wire Color | Function |
|---|---|
| Gray | Fuel Pump Relay Control Circuit |
| Black/White | Fuel Pump Ground Circuit |
| Orange | Fuel Pump Power Circuit |
| Black | Fuel Level Sensor Ground Circuit |
| Dark Blue | Fuel Level Sensor Signal Circuit |
| Gray/Black | Fuel Sender Signal Circuit |
Gray Wire
The gray wire is the fuel pump relay control circuit. This wire connects to the PCM’s fuel pump relay control circuit. When the PCM determines that the fuel pump should be turned on, it sends a signal through this wire to activate the fuel pump relay.
If you are experiencing issues with the fuel pump not receiving power, check the gray wire for any damage or loose connections.
Black/White Wire
The black/white wire is the fuel pump ground circuit. It provides the ground connection for the fuel pump.
If you are experiencing issues with the fuel pump not functioning, check the black/white wire for any damage or loose connections.
Orange Wire
The orange wire is the fuel pump power circuit. This wire provides power to the fuel pump when the fuel pump relay is activated.
If you are experiencing issues with the fuel pump not receiving power, check the orange wire for any damage or loose connections.
Black Wire
The black wire is the fuel level sensor ground circuit. It provides the ground connection for the fuel level sensor.
If you are experiencing issues with the fuel level sensor not functioning, check the black wire for any damage or loose connections.
Dark Blue Wire
The dark blue wire is the fuel level sensor signal circuit. This wire provides the signal from the fuel level sensor to the PCM.
If you are experiencing issues with the fuel level sensor not functioning, check the dark blue wire for any damage or loose connections.
Gray/Black Wire
The gray/black wire is the fuel sender signal circuit. This wire provides the signal from the fuel sender to the gauge cluster.
If you are experiencing issues with the fuel gauge not functioning, check the gray/black wire for any damage or loose connections.
Frequently Asked Questions
Q: What are the signs of a bad fuel pump?
A: There are a few signs that your fuel pump may be failing, including engine sputtering, difficulty starting, and loss of power.
Q: Can a bad fuel pump cause a check engine light?
A: Yes, a bad fuel pump can cause a check engine light to come on. This is because the fuel pump is an essential component of the fuel system, and if it is not functioning correctly, it can cause issues with the engine.
Q: How do I test my fuel pump?
A: To test your fuel pump, you will need a fuel pressure gauge. Connect the gauge to the fuel line and turn the ignition key to the “on” position. The fuel pressure should read within the manufacturer’s specifications. If it does not, then you may have a faulty fuel pump or fuel system issue.
Q: Can I replace the fuel pump myself?
A: While it is possible to replace the fuel pump yourself, it is recommended that you have a professional mechanic do it for you. This is because working with fuel can be dangerous, and it is important to ensure that the fuel pump is installed correctly for proper functioning.
Q: How much does it cost to replace a fuel pump?
A: The cost to replace a fuel pump can vary depending on your location and vehicle. On average, the cost can range from $400-$600 for parts and labor.
Conclusion
The fuel pump is an essential component of your 97 Blazer’s fuel system. If you are experiencing issues with your fuel pump, the wiring diagram and troubleshooting tips provided in this article should help you diagnose and fix the issue. However, if you are unsure or uncomfortable working with fuel, it is recommended that you take your vehicle to a professional mechanic for repair.
