The ignition switch is mainly located in the place where you insert your key, just behind the key cylinder. Normally, It unlocks the ignition lock cylinder and sends electrical signals to the starter to start the engine. A faulty ignition switch in your car may caused many issues. (Symptoms of a Faulty Ignition Switch)
Changing an ignition switch is not that difficult, just requiring common hand tools. Here are the main steps for reference.
1. Disconnect the negative cable from the battery to prevent accidental contact;
2. Take out the trim around the steering wheel, and release the clips on the ignition module cover;
3. Disconnect the electrical connector from the ignition switch;
4. Set the ignition switch to the accessory position. The accessory position is to let the vehicle’s electronics run without the starter works when the battery is connected;
5. Press the release pin and take out the ignition switch;
6. Put the ignition switch into the right location;
7. Reconnect the negative terminal on the battery and insert the key to start the car.
They are the main steps to replace an ignition switch. If you are still not sure how to change an ignition switch, maybe you can simply ask a professional technician to help you change the faulty ignition switch.