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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. Over time normal wear and tear could cause the switch to fail.

You can remove the steering column trim with specially designed tools to gain access to the ignition cylinder module. Check the repair manual to get guidance on how to do this in a safe manner.

1. Make sure to check the Switch

One of the most common ignition issues is a defective switch. It acts as a bridge between two contacts, regulating the relays' activation and deactivation. Because it doesn't channel the full power of devices like the starter, it's a lighter component that is less likely to fail. The switch could still be damaged or corrosion-prone.

One sign of a damaged switch is a difficulty turning the key. This can be caused by various factors that include not inserting the key correctly or wearing out the mechanism over time. It's not common to see people mix their keys up with keys from someone else's. This could cause mechanical damage.

If the switch isn't functioning there are a few things you could try before calling a locksmith. First, you'll need to ensure that the battery is fully charged and there aren't any other electrical issues within the system. Also, you should examine the voltage of every component to determine if they're providing enough power. After you've completed these steps, it's time 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. You'll need a flathead and a piece of material that is long enough to insert the pin. You can use anything from a paintbrush, to a kabob stick, but avoid anything that is hard as it could be broken into the hole.

Remove any trim pieces that overhang the switch when you're ready to go. After removing the trim pieces, take off any screws that hold the switch in position. Then, gently take it off. Depending on the model, you might be required to disconnect any wires that connect to it. You can learn how to do it in the manual of your vehicle.

If the ignition switch isn't working it is recommended to replace it by professionals. It's not easy to replace the ignition switch without removing your steering column. This could result in an accidental airbag deployment when you don't do it correctly. This is why it is recommended to let your locksmith take care of this for you.

2. Check the Wiring

If you can't turn the key in the ignition or your car won't start, the issue could be due to any of the parts of your car's 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 turned by the key stuck In ignition. It has four positions including off run, accessory, and "lock." If the switch is in the lock position (which usually has an indicator in red) the ignition circuit is live and it's impossible to start the engine.

To determine if the ignition switch is bad or if the ignition coil is faulty, you'll have to conduct an electrical test using a voltage meter. The voltmeter should read approximately 12.6 volts when the ignition switch is in the running position. If the voltage is lower than that then there is an open circuit somewhere within the system. This could be at the solenoid, the battery or at the ignition coil itself.

Connect the electrical connector to ensure that it doesn't interfere with the test. Then set the voltmeter to the resistance or continuity mode and put 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 the voltmeter shows "open" or does not register any voltage, it's time to replace the switch.

When replacing the switch, be certain to use a new ignition cylinder as well as a high quality key cut to ensure that your car will start and run properly. When replacing the ignition switch, you must be careful not to hit the pins of the ignition cylinder with your tools, or they'll get stuck and your engine won't start. In certain vehicles, you'll have to remove the steering column and gear selector to get access to the ignition cylinder. This can be difficult, and it is not recommended until you have an owner's guideline that states it's safe. Otherwise serious damage to the steering column and shifting mechanism is possible.

3. Check the Cylinder

If you've gone through the wiring, battery and ignition switch, but you can't get your car start, it might be time to look at the cylinder. It's the part that holds your key and is mechanically connected to the lock on the steering wheel so that a potential thief cannot drive the car ignition key replacement without a key.

You might observe that your key will not turn if the cylinder is worn out. Sometimes, the pins inside the cylinder become stuck when they adjust to the shape of the key, which can cause your car not to start. Alternatively, the cylinder may be loose however a tap using a small tack hammer can assist in releasing it. Just be careful not to disturb the springs inside and ensure that the key is correctly installed prior to tapping.

If you need to jiggle and move the key around before it will start, this is another sign that your cylinder has been damaged. This is a bad indication and should be corrected immediately, since it will continue to get worse as time passes.

To test the cylinder, you'll need to unplug your battery and take off the cover on your steering wheel until you can access the ignition module. You'll then be able pull out the old ignition switch and the cylinder for ignition made of metal. If you don't have an extra switch, you might be able to bring the original ignition cylinder and switch to a locksmith for reuse as long as they're in good condition. After replacing the switch and cylinder make sure you connect the wiring harness, secure it in place and reattach any covers, or panels you've removed.

4. Check the Spark Plugs

The spark plug is the final link in your ignition chain. When it is damaged it will stop the engine from running. It can be that your car ignition lock will not start at all, or it will run badly. In any case, the root is likely to be one of several things that hinder or prevent the flow of electricity across the spark plug gap which allows your engine's gas and fuel mixture to run.

Before you begin working on your spark plugs, make sure that you work on a level surface and employing protective gloves and tools to avoid getting struck. Spark plugs can be very hot and can cause serious injuries if they are touched with bare hands.

You may notice a light gray or brown fleck on the top of the electrode when a spark plug is bad. It may also have a black coating on the side of the electrode. These deposits or a build-up of fouling could prevent high-voltage electrical current from crossing the gap between your spark plug, igniting an engine.

If you suspect your spark plugs might be the culprit You could test them by remove them from the tube that is inside the ignition coil. You can do this by disconnecting the coil from the plug wire and following the correct procedure for your vehicle to remove components that cover the spark plugs. After you have removed the plugs, you can place them on a grounded metal surface and crank the engine. If they are good you will be able to see a strong blue spark across the gap between the tip of the central electrode.

If you aren't seeing a spark, you've found the problem. Next, you'll need to go backwards through your ignition chain and test each component until the spark plugs aren't working. Every system will get older and eventually break and this is especially true for ignition systems. But, regular maintenance can help to slow down the process and avoid a major problem at the worst moment.