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 1,000 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!
  1. Home
  2. Questions
  3. 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: No cold air

There are many reasons why the AC would only blow hot air in your car. The most common would be a pressure switch or low refrigerant. Over time the refrigerant will leak out and once it is low enough it...

Q: Car won't start

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Q: When I start my van the gauge will bounce up and down

This sounds like most likely an oil pressure sending unit problem. These vans are somewhat known for this problem. The sending unit sits down near the oil filter and will cause the gauge to read intermittently when the sending unit...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...