There's no on/off switch you can flip to turn the fuel pump on and off like you might find in some older cars. Any attempt to directly wire a switch to the fuel pump would be extremely dangerous and could cause a fire.
If you're experiencing fuel delivery problems:
* Don't try to jury-rig a switch. This is unsafe.
* Check the fuel pump relay: This is a more common and safer point of failure. You'll need a wiring diagram to locate the relay and test it with a multimeter.
* Test the fuel pump's inertia switch: Some Lumina models have an inertia switch that shuts off the fuel pump in a collision. Check for this and reset it if necessary.
* Have a qualified mechanic diagnose the issue: This is the best course of action to avoid potentially dangerous situations and ensure proper repair. They have the tools and expertise to pinpoint the problem safely.
In short, the "switch" for the fuel pump is the complex system managed by the PCM, not a simple on/off switch you can access. Trying to bypass this system is extremely risky.
