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9 Lessons Your Parents Taught You About Fix Car Ignition
How to Fix Car Ignition Problems

The car will not start unless the switch transmits an electrical signal to the starter. Normal wear and tear over time can result in the switch not functioning properly.

Using specially designed tools, you can remove your steering column trim and access the ignition cylinder module. Refer to the repair manual to get guidance on how to do this in a safe manner.

1. Check the Switch

A defective switch is one of the most common ignition issues. It functions as bridge between two contacts, and controls when relays activate and deactivate. Because it isn't able to channel the full power of devices such as the starter, it's a lighter-duty component that's less likely to fail. The switch can still be damaged or corroded.

G28 of a bad switch is difficulty turning the key. This can be caused by a variety of things that include incorrectly inserting the key or wearing out the mechanism over time. It's also common for people to misplace their keys to their car with those of the keys of someone else, which can result in mechanical damage.

Before calling a locksmith you may try a few options. First, make sure the battery is fully charged and there aren't any other electrical issues within the system. You should also examine the voltage of every component to see if they're supplying adequate power. Once you've completed these steps, you can begin troubleshooting.

Luckily the ignition switch is easy to replace. It is connected to the ignition module, a round piece of metal that connects everything. You'll need an elongated flathead as well as something long enough to insert the pin. You can employ anything from a paintbrush to Kabob stick, but you should avoid anything that is hard as it could break into the hole.

Once you're ready to complete the job, you'll need to take away any trim pieces that cover the area around the ignition switch. After removing the trim pieces, remove any screws holding the switch in place. Then, gently pull it out. Depending on the model you might need to disconnect any cables connected 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 an expert. Replacing it can involve disabling the steering column which may trigger unintentional airbag deployment if it's done improperly. It's best to allow your locksmith to handle this.

2. Check the Wiring

Your car may not start if it is difficult to turn the ignition key or it will not start. This could be due to a number components in the ignition system. Understanding how the ignition system works can help you spot problems and make the necessary repairs.

The ignition switch is an electrical switch with multiple poles that is controlled by the key. It has four positions including off run, accessory, and "lock." If the switch is locked (which is typically shown by the red light) the ignition circuit is activated and it is not possible to start your car.

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 around 12.6 volts when the ignition switch is in the running position. If the voltage falls below that level, it's a sign there's an open circuit within the system. This could be at the solenoid, the battery or the ignition coil itself.

Remove the electrical connector from the ignition switch so that no other components can interfere with your test. Set the voltmeter to the continuity or resistance modes and place one lead on one of the terminals of the ignition switch. The other lead should be connected to the positive terminal of the battery. If the voltmeter reads "open" or does not detect any voltage, it is recommended to replace the switch.

Use a brand new ignition key and a top-quality ignition cylinder when you replace the switch to ensure that your vehicle starts and runs correctly. Also, when replacing the ignition switch, you must be careful not to strike the cylinder's pins on the ignition with your tools, or they'll become stuck and your engine will not start. You'll need to remove the steering wheel and gear selector in certain vehicles to gain access to the ignition cylinder. This isn't easy and isn't recommended until you have an owner's manual that states it's safe. Otherwise serious damage to the steering column or shifting mechanism is likely.

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 component that holds your key and is connected to the steering wheel lock so that a potential thief cannot control the car without a key.

You might be noticing that your key does not rotate if the cylinder is worn out. The pins inside the cylinder can get stuck when they adapt to your key's shape. This can cause your car to not start. The cylinder could also be loose, but a tap with the small hammer from a tack can aid in releasing it. Just be careful not to jumble the springs inside and ensure that your key is correctly installed prior to tapping.

Another sign that your cylinder is failing is when you have to move the key around and try multiple positions before it begins. This is a bad indication and needs to be fixed immediately, since it will only get worse over time.

To check the cylinder, you'll have to disconnect your battery and take off the cover from your steering wheel until you're able to access the ignition module. The old ignition switch should be simple to take off, as will the cylinder made of steel. If you don't have an extra ignition switch lying around, it's possible to take your original ignition switch and cylinder to a locksmith to reuse them, as long as they're in good condition. After replacing the ignition switch and cylinder, ensure that you connect the wiring to secure it, then reattach all covers and panels that you removed.

4. Check the Spark Plugs

The spark plug is the ignition system's last link. If it fails, the engine can't run. It can be that your vehicle won't start at all or it will run poorly. In either case, it's likely that one of several things are preventing or impeding electricity from jumping across spark plug gaps, which 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 getting zapped. Spark plugs are hot and could cause serious injuries when touched with your skin.

If a spark plug goes bad, you may be able to see that the top of the central electrode has a slight brown or gray residue on it. The electrode could also have a dark layer. The deposits or fouling may stop high-voltage electrical current from jumping across the gap between the spark plug and starting an engine.

If you suspect that your spark plugs could be the cause, you can test them by having them remove them from their tube inside the ignition coil. This can be accomplished by disconnecting the coil as well as 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. After removing the plugs, place them on a metal surface that is grounded and start the engine. If they are working you should see a bright blue spark near the point of the central electrode.

If you don't see any spark, you've identified the issue. Next, you'll need to go backwards through your ignition chain and test each component until the spark plugs aren't functioning. All systems wear out and eventually break, and this is particularly relevant to ignition systems. Routine maintenance can help to reduce the time it takes to repair and prevent an issue at the worst possible time.