What Is the Part Called Behind the Ignition Lock Cylinder?

If you're having trouble starting your car or your key won’t turn in the ignition, the issue might be related to the components behind the ignition lock cylinder. Understanding these parts can help you diagnose and fix the problem efficiently.

In this guide, we’ll explore:

· The ignition lock cylinder and its function

· The part behind the ignition lock cylinder

· Common symptoms of a failing ignition switch

· How to replace or repair these components

What Is an Ignition Lock Cylinder?

The ignition lock cylinder is the mechanical part where you insert your car key to start the vehicle. When you turn the key, it engages a series of components that power the electrical systems and start the engine.

How Does the Ignition Lock Cylinder Work?

1.Key Insertion – The key slides into the cylinder.

2.Tumbler Alignment – The pins inside the cylinder align with the key’s cuts.

3.Rotation – When the key turns, it activates the ignition switch, which sends power to the starter and other systems.

What Is the Part Behind the Ignition Lock Cylinder Called?

The component directly behind the ignition lock cylinder is called the ignition switch.

Ignition Switch Function

· Electrical Control – The ignition switch is an electrical component that sends power to the starter, fuel system, and other critical circuits.

· Position Settings – It has multiple positions (Off, Accessory, On, Start) that control different vehicle functions.

How the Ignition Switch Connects to the Lock Cylinder

The lock cylinder is mechanically linked to the ignition switch. When you turn the key, the cylinder rotates and triggers the switch, which then activates the electrical systems.

Symptoms of a Failing Ignition Lock Cylinder or Switch

If either the ignition lock cylinder or the ignition switch fails, you may experience:

· Key won’t turn – Worn-out tumblers or debris inside the cylinder.

· Car won’t start – Faulty ignition switch not sending power to the starter.

· Stalling while driving – Intermittent electrical failure in the switch.

· Accessories not working – No power in the "On" or "Accessory" positions.

How to Replace the Ignition Lock Cylinder and Switch

Tools Needed

· Screwdrivers

· Wrenches

· Ignition removal tool (if required)

· Replacement cylinder or switch

Step-by-Step Replacement

1.Disconnect the Battery – Prevent electrical shorts.

2.Remove Steering Column Covers – Access the ignition assembly.

3.Extract the Lock Cylinder – Some models require a release pin or tool.

4.Unplug the Ignition Switch – Disconnect wiring harnesses.

5.Install New Components – Replace the cylinder and/or switch.

6.Reassemble and Test – Reconnect the battery and check functionality.

Conclusion

The part behind the ignition lock cylinder is the ignition switch, which controls the electrical functions of your vehicle. If your key is stuck or the car won’t start, inspecting these components can help identify the issue.

For persistent problems, consult a professional mechanic to ensure proper diagnosis and repair.

FAQ

Q: Can I replace just the ignition lock cylinder?
A: Yes, but if the switch is faulty, you may need to replace both.

Q: How much does it cost to replace an ignition switch?
A: Typically between $150-$400, including labor.

Q: What causes an ignition switch to fail?
A: Wear and tear, electrical issues, or a faulty lock cylinder.

By understanding these components, you can better maintain your vehicle’s ignition system and avoid unexpected breakdowns.

Lock Cylinder

mortise cylinder lock

mortise lock cylinder