Therefore, you won't find a separate wire labeled "fuel pump ground". Problems with fuel pump grounding usually manifest as poor connections *somewhere in the path* between the fuel pump and the car's chassis. This path involves:
* The fuel tank: The tank itself needs to be properly grounded to the car body. Check for corrosion or loose connections at the tank straps or any mounting points.
* The fuel pump itself: Ensure the fuel pump's mounting is clean and provides good metal-to-metal contact.
* Wiring harness connections: Though the main fuel pump power is through a wire, any corrosion or poor connections in the harness near the tank can affect the ground path.
To troubleshoot a grounding issue, focus on cleaning and ensuring good electrical contact at the fuel tank's mounting points to the car's chassis. A multimeter can help check for continuity between the tank and a known good ground point on the car's body. If you have a fuel pump problem, make sure you address all potential grounding issues as a part of your troubleshooting. Remember to disconnect the negative battery terminal before working on any fuel system components.
