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How to Fix Car Ignition Problems

The fix car ignition will not start until the switch sends an electrical signal to the starter. Normal wear and tear over time may result in the switch not functioning properly.

You can remove the trim on your steering column using specialized tools to access the ignition cylinder module. Consult the repair manual to get guidance on how to do this correctly.

1. Make sure you check the Switch

A malfunctioning switch is one of the most frequently encountered ignition issues. It controls when relays are activated and deactivated, acting as a bridge. It is less likely to fail due to the fact that it does not channel the full power from devices such as the starter. However, it's still possible for the switch to be damaged or corrosion-prone.

A bad switch can be identified by a difficult time turning the key. This could be due to various reasons such as the wrong way to insert a key, or the mechanism being worn out over time. It's also commonplace for people to misplace their car ignition key replacement keys with another's, which could result in mechanical damage.

Before calling a locksmith you may try a few options. First, make sure that the battery is fully charged and that there aren't any other electrical issues in the system. You should also verify the voltage of every component to ensure that they are providing enough power. Once you've done these steps, you're ready to begin troubleshooting.

The ignition switch is easy to replace. It is connected to the ignition module, which is a round piece of metal that connects everything. To replace it, you'll need a flathead screwdriver and something long enough to press the pin inside. This can be anything from an artist's brush to a Kabob skewer, but you should stay clear of anything brittle that could break within the hole.

Remove any trim pieces that overhang the switch once you're ready to work. After this, loosen and remove any screws that are holding the switch in place and then carefully pull it out. Depending on the model, you might be required to disconnect any wires 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 have it replaced by a professional. It is possible to replace it by disabling the steering column, which could result in unintentional airbag deployment if it's done improperly. It is best to allow your locksmith to handle this.

2. Check the Wiring

The car may not start if you cannot turn the key or it will not start. This could be due a number components in the ignition system. It's important to understand how the ignition system functions to be able to spot issues and make the appropriate repairs.

The ignition switch is an electrical switch with multiple poles that is controlled by the key. It has four positions: off, accessory, run and "lock." When the switch is in the lock position (which typically has a red indicator) the ignition circuit is in operation and it's impossible to start the engine.

You can use a voltmeter to quickly test the ignition switch and ignition coil. The voltmeter should read approximately 12.6 volts when the ignition switch is in the running position. If the voltage falls below that it indicates that there is an open circuit within the system. This could be at the solenoid, the battery or at the ignition coil itself.

Remove the electrical connector so that it does not interfere with the test. Then set the voltmeter to the resistance or continuity mode and place one lead on one of the ignition switch terminals. The other leads should go to the positive terminal of the battery. If the voltmeter is "open" or fails to register any voltage, you should replace the switch.

If you're replacing the switch, be sure to use a brand new ignition cylinder as well as a high quality key cut to ensure that your car ignition switch replacement will start and run properly. Also, when you replace the ignition switch, be careful not to hit the ignition cylinder pins with your tools or they'll get stuck and the engine will not start. In some vehicles, you'll have to remove the steering column and the gear selector in order to access the ignition cylinder. This can be difficult 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 likely.

3. Check the Cylinder

If you have tried the battery, the wiring and the ignition switch but still can't start your car it could be time to check the cylinder. The cylinder is the component that holds the key. It is mechanically linked to the steering lock so that thieves can't drive the car if it's not there.

You may observe that your key will not turn if the cylinder is worn out. The pins inside the cylinder could become stuck when they adapt to your key's shape. This can cause your car to not start. The cylinder may also be loose. A tap with the tackhammer can help. Be careful not mixing up the springs and ensure that your key is properly placed.

Another indication that your cylinder is in trouble is if you have to move the key around and test it in various positions before it begins. This is a sign of trouble and should be addressed immediately, as it will only get worse over time.

To examine the cylinder you'll need to disconnect your battery and remove the cover from your steering wheel until you can access the ignition module. You'll then be able to pull out the old ignition switch and the metal ignition cylinder. If you don't have a spare switch, you might be able to take your original ignition cylinder and switch to locksmiths for reuse so long they're in good shape. After replacing the switch and cylinder, ensure that you reconnect the wiring harness and secure it and reattach any covers or panels that you have removed.

4. Make sure you check the Spark Plugs

The spark plug is the ignition system's last link. The engine cannot run if the spark plug breaks. It could be that your vehicle won't start at all, or it will run poorly. In either case, the cause is likely to be one of a few things that prevent or impair electricity from crossing the spark plug gap which ignites your engine's air and fuel mixture.

Before you begin working on your spark plugs, be sure that you work on a safe surface and employing protective gloves and tools to keep from being zapped. Spark plugs can be extremely hot and can cause serious injuries if they are touched by hands without gloves.

When a spark plug is bad, you might observe that the edge of the central electrode has a slight brown or gray substance on it. It could 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 jumping across the gap between the spark plug and starting an engine.

If you suspect your spark plugs might be the cause you can test them by having them remove them from their tube inside the ignition coil. This can be done by disconnecting the coil as well as the plug wire. Then, you will need to follow the correct procedure for your vehicle to remove the components that surround the plugs. Once you have removed the plugs you can place them on a surface that is grounded and crank the engine. If they are good, you should see a strong blue spark extending across the gap in the middle of the central electrode.

If you don't see a spark, you've identified the problem. The next step is to go backwards through your ignition chain and test each part until the spark plugs stop functioning. All systems get older and eventually break and this is especially relevant to ignition systems. However, regular maintenance can slow the process down and avoid a major headache at the worst time.