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How to Fix Car Ignition Problems

A car won't start unless the ignition switch is sending an electrical signal to the starter motor. Normal wear and tear over time can cause the switch to malfunction.

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

1. Check the Switch

One of the most frequent ignition issues is a defective switch. It controls the time when relays are activated and deactivated by acting as bridge. Since it doesn't transmit the full power of devices like the starter, it's a lighter-duty component that's less likely fail. However, it's still possible for the switch to get damaged or corrosion-prone.

A defective switch can be identified by a difficulty turning the key. This can be due to many factors such as incorrectly inserting a key or deteriorating the mechanism over time. It's not uncommon to see people mix keys with keys from someone else's. This can result in mechanical damage.

Before calling a locksmith you may try a few options. First, you'll need to ensure that the battery is fully charged and that there aren't any other electrical issues in the system. It is also important to check the voltage of each component to determine if it's providing enough power. After you've completed these steps, it's time to start troubleshooting.

Fortunately the ignition switch is easy to replace. It's connected to the ignition cylinder, which is a round module that connects everything. It's necessary to use an elongated flathead as well as something long enough to insert the pin. This can be anything from paintbrush handles to Kabob skewer. However, it is best to avoid anything that is brittle and break inside the hole.

Remove any trim pieces that overhang the switch when you are ready to work. After taking off the trim pieces, take off any screws that hold the switch in place. Then, carefully take it off. Depending on the model you may have to cut off the cables that connect to it. If you have a manual for your vehicle it will explain exactly how to do it.

If the ignition switch isn't working, it's best to replace it by professionals. The replacement process involves disabling the steering column, which could result in unintentional airbag deployment if done incorrectly. For this reason, it's often best to have the locksmith in your area handle this for you.

2. Check the Wiring

The car may not start if it is difficult to turn the key or if it isn't starting. This could be due to a number of components within the ignition system. Understanding how the ignition system functions will help you identify problems and make the correct repairs.

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

To determine whether the ignition switch is defective or if the ignition coil itself is bad, you have to conduct an electrical test using the help of a voltage meter. The voltmeter should read approximately 12.6 volts when the ignition switch is in the run position. If the voltage falls below that, there is an open circuit somewhere within the system. This could be at the solenoid, the battery or the ignition coil itself.

Connect the electrical connector to the ignition switch to ensure that there are no other components that could 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 go to the positive terminal of the battery. If the voltage meter shows "open" or doesn't register any voltage it's time to replace the switch.

Use a brand new ignition key and high-quality ignition cylinder when you replace the switch to ensure your vehicle is running and starts correctly. Also, when you replace the auto ignition key replacement switch, be careful not to strike the cylinder's pins on the ignition with your tools, or they'll get stuck and the engine will not start. In certain vehicles, you'll have to remove the steering column and the gear selector to access the ignition cylinder. This can be difficult and is not recommended unless you have an owner's guideline that says that it is safe to do so. If you do not then you could cause severe damage to your steering column and shift mechanism.

3. Check the Cylinder

If you've gone through the battery, wiring and ignition switch and still cannot get your car to start, it might be time to examine the cylinder. It's the part that holds your key and is connected to the steering wheel lock so a would-be thief can't steer the car without the key.

You might be noticing that your key does not turn if the cylinder is worn out. Sometimes, the pins in the cylinder are stuck as they adapt to the shape of the key, which could cause your car not to start. The cylinder might also be sloppy. Tapping it with the small tackhammer may aid. Be careful not mixing with the springs and ensure that your key is properly inserted.

Another sign that your cylinder is going bad is if you have to turn the key and try different positions before it gets started. This is a bad sign, and it should be corrected right away as it will only worsen over time.

To examine the cylinder you'll need to unplug your battery, and then remove the cover around your steering wheel until you're able to access the ignition module. Then, you'll be able to pull out the old ignition switch and the metal ignition cylinder. If you don't have an extra switch, you might be able to bring the original ignition cylinder and switch to locksmiths for reuse as long as they're in good condition. After replacing the ignition switch and cylinder ensure that you reconnect the wiring, secure it and reattach the panels and covers that you took off.

4. Check the Spark Plugs

The spark plug is the ignition system's final link. When it breaks it stops the engine from running. This can take the form of your car not running at all, or it may start but run poorly. In either of these scenarios, it's likely that one or more factors are hindering or blocking the flow of electricity across spark plug gaps, which ignites the air and fuel mixture in your engine.

Be sure to wear gloves and protective tools before working with your spark plugs. Spark plugs can get very hot and could cause serious injuries if they are touched with bare hands.

There may be a slight brown or gray residue on the top of the electrode if the spark plug is damaged. The electrode could also be covered with a dark layer. These deposits or fouling can stop high-voltage electrical current from jumping across the gap of the spark plug and starting an engine.

If you suspect that your spark plugs could be the culprit, you can test them if you 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 proper procedure for your car to remove any components that are covering the spark plugs. After you have removed the plugs you can place them on a grounded metal surface and then crank the engine. If they are working you should see a bright blue spark near the edge of the central electrode.

If you don't see any spark, you've found the problem. The next step is to go backwards through the ignition chain and test each part until the spark plugs aren't working. It is important to keep in mind that all systems wear down and break down with time and this is particularly applicable to ignition systems. Routine maintenance can help to slow down the process and avoid a major headache in the worst case.