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What would cause no power to fuel pump?
If you there is no power to the fuel pump or the relay, then there may be a possible electrical issue with the vehicle. If there is an issue with the switch or the circuit, perhaps a wiring problem, then power to the fuel system may be cut off.
What turns fuel pump on and off?
The fuel pump relay is a small unit covered in a plastic case, which has several sprockets on one side that are clipped onto the ignition system. The fuel pump relay is what turns on the fuel pump when you start your car and powers it down when you shut off the ignition.
What happens when a fuel pump relay goes bad?
If the fuel pump relay has an issue while the vehicle is operating it will cut off power to the fuel pump, which will cause the engine to stall. A faulty relay may allow the vehicle to be restarted a short while later, while a completely failed relay will not.
Where do you find the fuel pump relay?
When you shut off the ignition, it powers down the fuel pump. In most vehicles, the fuel pump relay can often be found in the fuse box in the engine bay, which is usually a long black box which contains fuel pump relay along with various other fuses and relays.
Where is the fuel pump in a car?
The fuel pump is located in the fuel tank, near the rear of the vehicle and can usually be heard when the engine starts. A healthy fuel pump plus a healthy fuel pump relay will often produce a variation of a low volume hum or whine which can be heard from inside the vehicle, or from the outside, near the fuel tank.
What kind of noise does a fuel pump make?
No noise from the fuel pump. Another symptom that may hint at an issue with the fuel pump relay is no noise from the fuel pump when the key is switched on. Most fuel pumps will produce a low volume hum or whine which can be heard from the inside the vehicle if listened for closely, or from the outside of the vehicle, near the fuel tank.