How to Bypass Inertia Switch(Step by Step Guide)

Inertia switches are safety devices found in many vehicles that shut off the fuel pump if a sudden movement, such as an accident, is detected.

How to Bypass Inertia Switch-Simple and Detailed Guide

  • Locate the inertia switch: The inertia switch is usually located near the driver’s side kick panel, or in some cases, tucked away inside of glove box.
  • Disconnect the negative battery cable: To avoid any risk of electric shock it is important to disconnect the negative battery cable first before proceeding with further steps.
  • Remove the inertia switch from its bracket: Use a screwdriver to remove screws that hold the inertia switch into place and then take it out.
  • Bypass the inertial switch: Take two short lengths of wire (about 6 inches) and strip off 3/4 inch of insulation from each end using a wire stripper tool or knife. Connect one end of each wire to either input terminal on top of the inertial switch, making sure that both wires are connected securely at their terminals and not touching each other anywhere else along their length; this will bridge them together creating a bypass for your vehicle’s electrical system around where it was blocked by your old inertial switch
  • Reattach everything you took apart earlier: Put back all components removed during step 2 & 3 in reverse order they were taken apart in, being careful not to leave any loose pieces behind when finished reconnecting everything properly and securely again as required for proper functioning operation once power is restored back up again afterwards

Ford fuel cut off switch (inertia switch) part 3. How to bypass a bad fuel cut off switch

How Do I Know If My Vehicle Has an Inertia Switch Installed

Inertia switches are safety devices installed in some vehicles to protect them from fuel-related fires.

To know if your vehicle has an inertia switch installed, there are a few steps you can take:

  • *Check your owner’s manual for information about the switch.
  • * Inspect under the dashboard or near the back of the car for a reset button.
  • * Ask a mechanic to inspect and test it for you.

In short, checking your owner’s manual or inspecting spots in and around your vehicle is one way to determine if an inertia switch is present.

Additionally, asking a professional mechanic will ensure that any potential problems with the device are identified before they become serious issues.

How to Bypass Inertia Switch


Is There a Way to Temporarily Bypass the Inertia Switch in Order to Get the Car Running Again

Yes, there is a way to temporarily bypass the inertia switch in order to get your car running again.

Here are the steps you should take:

1. Locate the switch – it can usually be found near or beneath the driver’s side of the dashboard.

2. Disconnect and reconnect each wire from the inertia switch individually, then plug them back into their respective ports.

3. Test if your car starts up when attempting to turn on the engine after doing this process – if successful, you have successfully bypassed your inertia switch!

However, it’s important to note that this is only a temporary fix and further investigation should be done by an experienced mechanic soon afterwards in order to identify and solve any underlying issues as quickly as possible.

How Do I Reset the Inertia Switch After Bypassing It

To reset the inertia switch after bypassing it, follow these steps:

• Locate the wiring harness connected to the switch.

• Disconnect the negative battery cable before you start.

• Unplug and remove the inertia switch from its mounting bracket.

• Reconnect all of wires back into their original positions on a new inertia switch.

• Reattach and plug in the new inertia switch onto its mounting bracket and make sure it is secured properly.

Finally, reconnect the negative battery cable to finish resetting your inertia switch!

Are There Any Risks Associated With Bypassing an Inertia Switch

Yes, there are risks associated with bypassing an inertia switch.

• The fuel pump may not be able to operate correctly as the inertia switch is designed to turn it on and off in response to changes in acceleration.

• It can also cause further damage if the vehicle continues operating after a crash or hard impact due to lack of protection from the inertia switch.

• In addition, it can prevent diagnostic information from being accurately read by mechanics when troubleshooting problems with the vehicle.

Overall, bypassing an inertia switch should only be done as a last resort and if absolutely necessary.


Overall, the inertia switch is an important part of a vehicle’s safety system that must be properly maintained and in working order. Bypassing it can be done with caution and care, but should only be attempted by experienced mechanics or technicians. If you are uncertain about how to bypass it, consulting a professional is highly recommended as taking shortcuts may lead to further damage.

It is crucial to follow all instructions carefully when attempting this task in order to ensure the best possible outcome for your vehicle.