Skip the auto shop - Our mechanics make house calls

Q: Hi Ben I noticed That when i took the inertia switch out my truck I heard something one is rattling is that normal

asked by on

Ben my truck won't start I checked the inertia switch and heard something inside moving freely around almost like a rattle is this normal

My car has 230000 miles.
My car has an automatic transmission.

The inertia switch has a metal ball inside the switch that will make contact between the two terminals of the switch when working properly. The inertia switch is designed to move the ball away from the contacts in a roll over or an accident then the switch reset would need to be pressed to reset it. A rattle inside is the ball moving around. This is normal. Make sure when the switch is installed and reset you will have power on the pink wire when the key is cycled on. This wire goes direct to the fuel pump. If you do not have power to the inertia switch green wire then replace the fuel pump relay if you have power to the pump and still have no pressure from the fuel pump then replace the fuel pump.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • Hi Ben I noticed That when i took the inertia switch out my truck I heard something one is rattling is that normal

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Truck no longer starting

The battery and starting system would need to be checked to see if the battery or the cables are a problem. The charging system should be checked also. I recommend having a certified mechanic, such as one from YourMechanic, come...

Q: Brakes in my SUV are pulsating

You're probably correct that it is the rotors. To determine for certain if the rotors are warped, they should be measured for runout. Runout is the side to side movement of the brake rotor as it rotates. Often, this...

Q: I found this under the driver's side underneath my expedition but don't know what it is or where it goes

Hello. If you have found a loose harness, connector then it may be possible that they go to a component or feature that is not currently installed on the vehicle. You may be able to tell if this is the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...