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How to Fix Car Ignition Problems

The car won't start unless the switch transmits an electrical signal to the starter. Normal wear and tear over time could cause the switch to malfunction.

You can remove the trim on your steering column using specially designed tools to access the ignition cylinder module. Consult your repair manual to learn how to do it right.

1. Check the Switch

A malfunctioning switch is one of the most frequently encountered ignition issues. It controls the moment relays are activated, and deactivated by acting as a bridge. Because it isn't able to transmit the full power of devices like the starter, it's a lighter-duty component that is less likely to fail. However it's still possible for the switch to get damaged or corroded.

One sign of a damaged switch is the difficulty in turning the key. This can be due to a number of factors, including not inserting the correct key correctly or deteriorating the mechanism over time. It's not common for people to mix keys with someone else's. This can result in mechanical damage.

If the switch isn't working there are a few things you could try before calling a locksmith. First, make sure that the battery is fully charged and there are no electrical issues within the system. Also, you should verify the voltage of every component to ensure they are supplying enough power. After you've completed these steps, it's now time to begin troubleshooting.

Luckily the ignition switch is easy to replace. It is connected to the ignition module, a round piece of metal that holds everything together. You'll need 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 be careful of anything that is hard as it could be broken into the hole.

Remove any trimming pieces that overhang the switch once you're ready to go. After that remove and loosen the screws that are holding the switch in place then carefully pull it out. Depending on the model, you may need to disconnect the cables that connect to it. If you have an instruction manual for your vehicle it will explain exactly how to do this.

If the ignition switch isn't working it is recommended to replace it by an expert. Replacing it can involve disabling the steering column, which could trigger an unintentional deployment of airbags if done incorrectly. For this reason, it's best to have your locksmith take care of this for you.

2. Verify the Wire

Your car may not start if you are unable to turn the ignition key or it won't start. This could be due to a variety of components in the ignition system. Understanding how the ignition system functions can help you spot problems and make the appropriate repairs.

The ignition switch is a low voltage multi-pole electrical switch which is operated by a key. It includes four positions "off", "accessory", "run" and the "lock". When the switch is locked (which is typically shown by a red light) the ignition circuit is active and it is not possible to start your car ignition key replacement.

You can use a voltmeter quickly test the ignition switch and ignition coil. If the ignition switch is running at a certain voltage, the voltmeter should read around 12.6, If the voltage falls below that it indicates that there is an open circuit somewhere within the system. This could be at the solenoid, the battery or even the ignition coil itself.

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

If you're replacing the switch, be sure to use a brand new ignition cylinder and a top quality key cut to ensure that your vehicle will run and start correctly. Also, when replacing the ignition switch, be cautious not to touch the pins of the ignition cylinder with your tools or they'll get stuck and your engine will not start. In certain vehicles, you'll have to remove the steering column and the gear selector to get access to the ignition cylinder. This can be a challenge and should not be done unless you have an owner's manual that indicates it's safe to do this. Otherwise severe damage to the steering column and shifting mechanism is likely.

3. Check the Cylinder

If you've worked your way through the battery, wiring and ignition switch but you can't get your car ignition barrel replacement start, it could be time to examine the cylinder. It's the part that holds your key and is mechanically connected to the steering wheel lock so a would-be thief can't control the car without a key.

If your cylinder has started to wear out, you could be noticing that your key isn't able to turn. The pins in the cylinder could become stuck as they adjust to your key's shape. This could cause your vehicle to not start. Or, the cylinder might be shaky and a tap using a small tack hammer can help to free it. Be sure not to mix up the springs and ensure that the key is properly inserted.

If you have to move the key around before it will start, this is another sign that your cylinder has been damaged. This is a red flag and should be addressed immediately, as it will continue to get worse as time passes.

To test the cylinder, you'll need to unplug your battery, and then remove the cover from your steering wheel until you are able to access the lost ignition key module. Then, you'll be able pull out the old ignition switch and the cylinder for ignition made of metal. If you don't have an extra ignition switch lying around, it's possible that you can take your original ignition switch and the cylinder to a locksmith in order to reuse them as long as they are in good condition. After replacing the switch and cylinder, ensure that you reconnect the wiring harness, secure it in place and reattach any covers, or panels you removed.

4. Check the Spark Plugs

The spark plug is the last link in your ignition chain. The engine won't start if the spark plug breaks. It could be that your car won't start at all or it will run badly. In either of these scenarios, it's likely that one or more things are hindering or preventing electricity from jumping across spark plug gaps, which in turn ignites the fuel mixture and air in your engine.

Be sure to use gloves and protective tools before working with your spark plugs. Spark plugs are hot and can cause serious injury when touched with your skin.

When a spark plug is bad, you might be able to see that the top of the central electrode is covered with a slight brown or gray residue on it. The electrode could also have a dark coating. These deposits or a build-up of fouling could prevent high-voltage electrical current from jumping across the gap of your spark plug and igniting an engine.

If you suspect that your spark plugs could be to blame, you can test them by removing the plugs from their tube in the ignition coil. This can be accomplished by disconnection of the coil and the plug wire. Then, you'll need to follow the correct procedure for your vehicle in order to remove the components that surround the plugs. Once you have removed the plugs, you can place them on a grounded metal surface and turn the engine. If they are working you should be able to see a strong blue spark on the tip of central electrode.

If you don't see a spark, you've discovered the problem. The next step is to work back through the ignition system chain, testing each element until you find out what's hindering the spark plugs from doing their job. It is important to keep in mind that all systems wear down and break over time and this is particularly true of ignition systems. Regular maintenance can reduce the time it takes to repair and avoid an issue at the worst time.