What are the symptoms of a bad inertia switch?
What are the symptoms of a bad inertia switch?
Usually a bad or failing fuel pump shut off switch will produce a few symptoms that can alert the driver of a potential issue….Symptoms of a Bad or Failing Fuel Pump Shut Off Switch
- Engine suddenly stops while driving.
- Switch that trips for no reason.
- No start condition.
Where is the inertia switch on a Ford Ranger?
You can find the inertia switch, which is also known as the fuel pressure inertia switch (FPIS), on Your Ford Ranger’s passenger foot area, under the dash, near the front edge of the carpet.
How do you reset the inertia switch on a Ford Ranger?
Look on a side panel for a small, round button which you can pry off with a small screwdriver. Through this access hole you will be able to see the reset button on top of the inertia switch.
What triggers an inertia switch?
Inertia from a crash was used to trigger the switch. This worked good for a collision, but the switch would sometimes trigger after hitting a large enough bump, leaving a driver stranded on the side of the road. The inertia switch was reset by simply pushing the red button on the switch.
How does Ford inertia switch work?
The switch activates when a tiny ball runs up a ramp, which is triggered during the sharp deceleration during an accident. The ball makes an electrical contact at the top of the ramp, and the electrical current to the fuel pump is discontinued. It is a safety item found on every modern fuel-injected vehicle.
Where is the inertia switch on a 94 Ford Ranger?
The inertia switch is located on the toe-board, to the right of the transmission hump, in the passenger-side footwell. Turn the ignition switch OFF. Ensure that there is no fuel leaking in the engine compartment, along any of the lines or at the tank.
Where is the fuel reset button?
Note: The fuel pump shut off switch reset button is usually located either under the dash in the driver compartment or under the driver or passenger seat. Just move the seat forward and pull back on the carpet or popping off the cover under the seat to access the switch.
How do I reset my fuel pump shut off switch?
How to Reset a Fuel Pump Shut Off Switch
- Locate your car’s inertial trigger or airbag control module.
- Push the button on the inertial switch; it should be clearly marked as the fuel pump reset, and may be in a contrasting color to the case.
How does the inertia switch work?
The switch is called an inertia switch and is designed to shut off the fuel pump supplying gasoline to the fuel injection system in an accident. The switch activates when a tiny ball runs up a ramp, which is triggered during the sharp deceleration during an accident.
What can trip an inertia switch?
The inertia switch is a safety item incorporated by Ford in the fuel system of its vehicles. The only time the inertia switch should trip is during a collision. However, there are other occurrences that can trip an inertia switch, such as a blown tire or simply hitting a pothole in the road.