When it comes to vehicles, the fuel system plays an essential role. It’s responsible for delivering fuel from the tank to the engine, and for that to happen, the fuel pump needs to work correctly. If your 2007 Chevy Impala is having fuel delivery issues, it may be time to check the wiring of the fuel pump. In this article, we’ll go over the wiring diagram for the fuel pump and answer some frequently asked questions.
Wiring Diagram for the 2007 Chevy Impala Fuel Pump
The fuel pump wiring diagram for the 2007 Chevy Impala can be found in the vehicle’s owner manual or at a dealership. Here’s a simplified version:
| Circuit | Wire Color | Function |
|---|---|---|
| A | Purple | Fuel pump motor supply voltage |
| B | Black | Ground |
| C | Black/White | Fuel level sensor signal |
| D | Gray | Fuel pump motor control |
| E | Dark Blue/White | Sending unit reference voltage |
Circuit A: Fuel Pump Motor Supply Voltage
The purple wire provides power to the fuel pump motor. It’s connected to a 20 amp fuse located in the underhood fuse block labeled “F/PMP.” The fuel pump relay sends power from the fuse to the fuel pump. When the ignition switch is turned on, the fuel pump relay is energized, and the fuel pump motor starts running.
Circuit B: Ground
The black wire is the ground for the fuel pump motor. It’s connected to a ground point located near the fuel tank.
Circuit C: Fuel Level Sensor Signal
The black/white wire is responsible for sending the fuel level signal to the fuel gauge. It’s connected to the fuel level sensor, which is located inside the fuel tank.
Circuit D: Fuel Pump Motor Control
The gray wire is the fuel pump motor control wire. It’s connected to the fuel pump relay, which sends a ground signal to the fuel pump motor to turn it on.
Circuit E: Sending Unit Reference Voltage
The dark blue/white wire is the sending unit reference voltage wire. It’s connected to the fuel level sensor, which sends a signal back to the PCM (powertrain control module) indicating the fuel level. The reference voltage is usually around 5 volts.
Frequently Asked Questions
What Causes Fuel Pump Wiring Problems in a 2007 Chevy Impala?
There are several reasons why the fuel pump wiring may cause problems in a 2007 Chevy Impala, including:
- Corrosion or damage to the fuel pump connector or wiring
- A failed fuel pump relay
- Blown fuse
- A faulty fuel pump
How Do I Check the Fuel Pump Wiring on My 2007 Chevy Impala?
Checking the fuel pump wiring on a 2007 Chevy Impala involves using a multimeter to test for continuity and voltage. Here are the steps:
- Disconnect the fuel pump wiring harness and inspect it for damage or corrosion.
- Set the multimeter to the continuity setting and test the fuel pump relay to ensure it’s working correctly.
- Test the fuel pump motor for continuity and resistance.
- Test the fuel pump circuit for voltage, starting with the fuel pump fuse and moving on to the fuel pump relay and wiring.
Can I Replace the Fuel Pump Wiring on My 2007 Chevy Impala Myself?
While it’s possible to replace the fuel pump wiring on a 2007 Chevy Impala yourself, it’s not recommended unless you have experience with automotive electrical systems. Fuel systems can be dangerous, so it’s best to leave the repairs to a professional mechanic.
How Much Does It Cost to Replace the Fuel Pump Wiring on a 2007 Chevy Impala?
The cost to replace the fuel pump wiring on a 2007 Chevy Impala varies depending on the severity of the issue and the mechanic’s labor rates. On average, it can cost anywhere from $200 to $500 for parts and labor.
Conclusion
If you’re experiencing fuel delivery issues with your 2007 Chevy Impala, it may be time to check the fuel pump wiring. The wiring diagram provided in this article can help you troubleshoot and repair the issue. However, if you’re not experienced with automotive electrical systems, it’s best to leave the repairs to a professional mechanic.
