How to Fix Car Ignition Problems

The car will not start until the switch sends an electrical signal to the starter. Over time wear and tear could cause the switch to fail.

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

1. Check the Switch

One of the most common ignition problems is a bad switch. It functions as bridge between two contacts, controlling when relays activate and deactivate. Since it doesn't channel the full power of devices like the starter, it's a less powerful component that's less likely to fail. However it's still possible for the switch to be damaged or corroded.

A bad switch can be identified by a difficult time turning the key. This could be due to many factors that include not inserting the correct key correctly or wearing down the mechanism over time. It's not common to see people confuse their keys with keys from someone else's. This can cause mechanical damage.

If the switch isn't working there are a few things you can try before calling a locksmith. First, you'll need to ensure that the battery is charged and that there aren't any other electrical issues that could be affecting the system. It is also important to examine the voltage of every component to determine if it's capable of supplying enough power. Once you've completed these steps, you're ready to begin troubleshooting.

The ignition switch is simple to replace. It is connected to the ignition module, a round component that connects everything. To replace it, you'll need a flathead screwdriver, and something that is long enough to push the pin inside. You can employ anything from a paintbrush to a Kabob stick, but be careful of anything that is brittle, as it can be broken into the hole.

Remove any trimming pieces that are covering the area around the switch when you are ready to go. After this, loosen and remove any screws that are holding the switch in place then carefully pull it out. Depending on the model, you may also need to disconnect any wires that connect to it. If you have a manual for the vehicle you own and model, it will show you exactly how to do this.

It is best to have the ignition switch replaced by a professional when it's not working. It's difficult to replace the ignition switch without disabling the steering column. This could lead to an unintentional airbag being deployed in the event that you don't do it correctly. For this reason, it is recommended to let your local locksmith handle this for you.

2. Check the Wire

Your car might not start if it is difficult to turn the ignition key or it isn't starting. 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 necessary repairs.

The ignition switch is a low-voltage multi-pole electrical switch that can be turned by the key. It has four positions that are off run, accessory, and "lock." If the switch is locked (which is usually marked by the red light) the ignition circuit is activated and it is impossible to start your vehicle.

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

Remove the electrical connector from the ignition switch so that no other components can interfere with the test. Set the voltmeter on the continuity or resistance modes and connect one lead on one of the terminals of the ignition switch. The other leads should go to the positive terminal on the battery. If the voltmeter reads "open" or doesn't register any voltage then it's time to replace the switch.

When 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 will start and run correctly. When replacing the switch, make sure not to strike the pins of the ignition cylinder using your tools. Otherwise, they will get stuck and your engine won't be able to run. In certain vehicles, you'll need to remove the steering column and the gear selector in order to access the ignition cylinder. This can be a challenge and shouldn't be done unless you have an owner's guideline that says it's safe to do so. If you don't you could cause irreparable damage to your steering column and the shift mechanism.

3. Check the Cylinder

If you've worked your way through the battery, wiring and ignition switch, but can't get your car ignition lock to start, it may be time to check the cylinder. The cylinder is the piece which holds the key and is mechanically attached to the steering lock to ensure that burglars won't be able to drive the car if it's not there.

You may notice that your key will not turn if the cylinder is worn out. The pins inside the cylinder can get stuck as they adapt to your key's shape. This could cause your vehicle to not start. The cylinder might also be loose. A tap with the small tackhammer may aid. Be careful not to mix with the springs and make sure your key is properly placed.

If you have to jiggle and move your key before it can start, this is another indication that your cylinder is become damaged. This is a sign of trouble and should be addressed immediately, as it will continue to get worse as time passes.

To check 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. The old ignition switch should be easy to remove, as should the cylinder for ignition made of metal. If you don't own an extra switch, you may 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 to secure it, then reattach all covers and panels that you took off.

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 car won't start at all or it will run poorly. In any case, the root is likely to be one of a few things that prevent or impair electricity from jumping across the spark plug gap which ignites your engine's air and fuel mixture to start.

Be sure to wear gloves and protective tools before working with your spark plugs. Spark plugs are hot and could cause serious injury when you touch them with your naked skin.

You might notice a light gray or brown fleck on the top of the electrode when the spark plug is defective. The electrode may also have a dark coating. These deposits or fouling can stop high-voltage electrical current from jumping across the gap of your spark plug and igniting an engine.

If you think that your spark plugs are to blame, you can test them by taking them from their tube in the ignition coil. This can be done by disconnecting the coil from the plug wire and following the appropriate procedure for your car ignition locked to remove the components that cover the spark plugs. After you have removed the plugs you can place them on a metal surface that is grounded and turn the engine. If they are good, you should be able to see a strong blue spark extending across the gap between the tip of the central electrode.

If you do not detect a spark, you've identified the problem. The next step is to go backwards through the ignition chain and test each part until the spark plugs aren't functioning. Every system will get older and eventually break and this is especially applicable to ignition systems. That said, routine maintenance can to slow down the process and avoid a big headache at the worst possible time.