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How To Explain Fix Car Ignition To Your Grandparents
How to Fix Car Ignition Problems

The car won't start until the switch sends an electrical signal to the starter. Over time normal wear and tear could cause the switch to fail.


With the help of special tools, you can remove the steering column trim and gain access to the ignition cylinder module. Check your repair manual for guidance on how to do this in a safe manner.

1. Make sure to check the Switch

A malfunctioning switch is among the most common ignition issues. It functions as a bridge between two contacts, regulating the relays' activation and deactivation. Because it isn't able to channel the full power of devices such as the starter, it's a lighter component that is less likely to fail. However it's still possible for the switch to get damaged or corrosion-prone.

One indication of a defective switch is a difficulty turning the key. This could be due to a variety of things that include not inserting the key correctly or the mechanism wearing out over time. It's not unusual for people to confuse their keys with those of others. This could cause mechanical damage.

If the switch isn't working, there are a few things you can try before calling a locksmith. First, you'll need to make sure the battery is fully charged and that there aren't any other electrical issues that could be affecting the system. You should also check the voltage of each component to determine if they're providing enough power. After you've completed the above steps, you'll be able to begin troubleshooting.

The ignition switch is simple to replace. It is connected to the ignition module, which is a round piece of equipment that holds everything together. It's necessary to use an elongated flathead as well as something long enough to insert the pin. You can use anything from a paintbrush to a Kabob stick, but you should avoid anything that is hard as it could be broken into the hole.

Remove any trimming pieces that cover the area around the switch when you're ready to work. After you've removed the trim pieces take off any screws that hold the switch in position. Then, carefully pull it out. Depending on the model, you might also have to unplug the wires that connect to it. If you have a manual for the vehicle you own and model, it will show you exactly how to do it.

It is recommended to have the ignition switch replaced by professionals in the event that it isn't working. The replacement process involves disabling the steering column, which may trigger unintentional airbag deployment if done incorrectly. It's best to let your local locksmith take care of this.

2. Verify the Wire

If you can't turn the key in the ignition or your car isn't starting, your problem could be related to any number of parts of your car's ignition system. Understanding how the ignition system functions will help you determine the cause of the problem and make the necessary repairs.

The ignition switch is an electrical switch that has multiple poles and is operated by the key. It has four positions: off, accessory, run and "lock." When the switch is in the lock position (which usually has a red indicator) the ignition circuit is live and it is not possible to start the engine.

To determine whether the ignition switch defective or if the ignition coil itself is faulty, you'll must conduct a quick electrical test using a Voltmeter. The voltmeter should read approximately 12.6 volts when the ignition switch is in the run position. If the voltage falls below that, it indicates there's an open circuit within the system. This could be the solenoid, battery or the ignition coil.

Disconnect the electrical connector from the ignition switch so that no other components interfere with the test. Set the voltmeter on the continuity or resistance modes and place one lead on one of the terminals on the ignition switch. The other lead should be connected to the positive terminal of the battery. If car ignition replacement reads "open" or does not register any voltage then it's time to replace the switch.

Use a new ignition key and a top-quality ignition cylinder when replacing the switch to ensure your vehicle starts and runs correctly. Also, when you replace the ignition switch, you must be careful not to hit the cylinder's pins on the ignition with your tools, or they'll get stuck and the engine won't start. You'll have to take off the steering wheel as well as the gear selector on some vehicles to get access to the ignition cylinder. This isn't easy and is not recommended unless you have an owner's manual that states it's safe to do so. Otherwise, serious damage to the steering column and shifting mechanism is possible.

3. Check the Cylinder

If you have tried the battery, the wiring, and the ignition switch but still cannot start your car it could be time to inspect the cylinder. The cylinder is the part that holds the key and is mechanically linked to the steering lock to ensure that thieves can't drive the car without it.

You might observe that your key will not turn if the cylinder is worn out. The pins in the cylinder may become stuck as they adjust to your key's shape. This could cause your vehicle to not start. The cylinder could also be shaky and a tap using the tack hammer may assist in releasing it. Be careful not mixing the springs, and ensure that your key is properly placed.

If you are required to move the key around before it will begin, this is another sign that your cylinder has become damaged. This is a sign of trouble and must be addressed immediately because it will worsen over time.

To check the cylinder you must remove the cover on the steering wheel and disconnect the battery. The old ignition switch should be simple to remove, as should the cylinder made of steel. If you don't own an extra switch, you may be able take your original ignition cylinder as well as switch to a locksmith for reuse as long they're in good shape. After replacing the ignition switch and cylinder, make sure to reconnect the wiring to secure it, then reattach the covers and panels you took off.

4. Check the Spark Plugs

The spark plug is the ignition system's last link. If it fails, the engine can't run. This could take the form of your car not running at all, or it could start but run poorly. In either case, it is likely that one of several things are hindering or preventing electrical current from crossing spark plug gaps, which then ignites the air and fuel mixture within your engine.

Before you begin working on your spark plugs, be sure you're working on a safe surface, using protective gloves and tools to keep from being struck. Spark plugs can be very hot and cause serious injuries if they are touched by hands without gloves.

When a spark plug is bad, you may observe that the edge of the electrode's central portion has a light gray or brown substance on it. It could also have a black coating on the sides of the electrode. The deposits or fouling may prevent high-voltage electrical current from crossing the gap between the spark plug and starting an engine.

If you believe that your spark plugs could be to blame you can test them by taking them from their tube in the ignition coil. This can be accomplished by disconnecting the coil and the plug wire. Then, you will need to follow the correct procedure for your vehicle to remove the components that cover the plugs. After removing the plugs place them on a surface that is grounded, and begin the engine. If they're working you should see an intense blue spark near the edge of the central electrode.

If you aren't seeing a spark, you've identified the issue. The next step is to go back through the ignition chain, testing each element until you discover what's hindering the spark plugs from performing their job. It's important to remember that all systems wear out and break over time and this is particularly the case with ignition systems. Regular maintenance can reduce the wear and tear and prevent a major headache at the worst possible time.