What wires go to the ignition switch? The Ultimate Guide - CarsCounsel (2023)

Hi folks, the ignition lock is used to start vehicles. It is responsible for creating sparks that bring your engine to life. So without further ado, let's look at the wires that go to the ignition switch.

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Which wires go to the ignition switch?

The ignition switch turns on the fuel as soon as you insert the keys; Various components work in sync to make this possible. This makes it almost impossible for a normal person to know anything about the ignition switch mechanism. If you suspect something is wrong with the ignition switch that is preventing it from starting, it will need to be replaced.

Replacing the ignition switch is not exactly unusual. It's one of those parts that can unexpectedly deteriorate and weaken with overuse, age, and a little bit of both.

Wiring is the most difficult aspect of replacing the ignition switch. You may have seen connected cars in movies before. There are numerous intertwined wires and cables underneath your car. Knowing which wires go to the ignition switch is key to keeping your ignition system running properly.

Ignition switch parts other than wires?

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Please note that the ignition system consists of two components: an ignition switch and a lock cylinder. Most people use both parts accordingly, although they both serve different purposes. Knowing the difference between the two is important to improve your chances of a thorough ignition repair. Buying and installing a wiring component will make things worse.


The subject of our article, the electronically controlled ignition switch, is located inside the steering column or chainring. The ignition switch is responsible for sending electronic signals to the car's computer, which allows you to control the entire system by placing and turning the key.

lock cylinder:

The lock cylinder extends beyond the dash or steering column where you would place and turn the key. They're quickly becoming a thing of the past as new-age cars feature keyless ignition systems, meaning you don't need a physical exam. Button. Here a wireless signal is sent between the key fob and the immobilizer authenticates it as the owner. Then all you have to do is press a button to start it.

In summary, the only job of the ignition switch is to simply turn the car on and off. It creates an interrelationship between your car's key components, be it the starter motor to start the engine or the in-car devices for the battery.

Ignition switch position you can turn:

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If you take a look at the exposed part of the ignition switch cylinder where the key is inserted, you will notice some letters. These indicate the different states that you can flip the power button into. For example, you might want to turn on the air conditioning but turn off the engine. Sounds interesting right? Well, that's how it works. The key is locked in different states, allowing you to do different things.

First place:

digit 0(LOCK or OFF):The sole purpose of this position is to let you safely let the key in. Simply put, it doesn't affect your car's ignition or electronics. Avoid turning the key clockwise to another position to keep the car in the same condition. If you want to remove the key from the slot, turn it back to the LOCK or OFF state. Otherwise the key remains blocked unchanged.

Second digit:

I position(Accessories): This is the secondary way of driving a car; Here it connects to the car's electrical and electronic accessories. However, the engine remains off, but you can certainly enjoy the comfort of the car. It can be anything that requires electricity to operate, from a multimedia system to heated seats, lights, power windows, etc. Remember that using all the amenities for a long period of time drains the battery.

Third place:

position II(On): This position prepares the engine for starting while simultaneously turning on all of your car's electrical accessories. It may also involve turning on the fuel pump to get fuel flowing to the engine.

Fourth digit:

III-Position(Start): Once you have decided to drive, you must turn the key and hold it in the START position to warm up the engine. Now the starter has to do the rest of the work by inducing a large voltage to burn the fuel-air mixture in the engine. When the engine goes into run mode, the switch would pull the key back to the ON position and shut off the starter.

Now that we have learned about the ignition switch locations, let's learn about the wiring that runs through the ignition switch.

Which wires go to the ignition switch?

First of all, the topic of cables for the ignition switch is a deep one. You need to learn more to figure out which wires go in which car. Find out more about your car here. Unfortunately, the ignition switch is not a universal gearbox and some cars may have a more distinctive shape than others.

Your attention should be drawn to the function and location of each pin behind the ignition switch. As said, some cars may have a different configuration; Usually there are four pins. These respective terminals are often stamped as:

Generally there are four locations where you can get the key. They are mentioned as follows:

  • BATTERY -Battery; Connect the ignition switch directly to the vehicle's 12V battery.
  • CALL UP -Begin; It is connected to the engine starting solenoid and is spring loaded on contact.
  • IGN-Turned on; the primary and standard terminal for vehicle ignition, accessories and other electrical services.
  • CAC-accessory; Connects and powers your car accessories like radio, lights, windows etc.

How is the ignition lock wired?

Below are the steps to follow to wire the ignition switch yourself. However, depending on your car, you may want to have a push button start switch wiring diagram.

1. Park your vehicle:Make sure your car is parked on level ground before turning off the engine.

2. Locate the terminals on the ignition switch:Locate the pins on the back of the power button. You will find four terminals with labels such as "BATT" (battery), "ST" (start), "IGN" (ignition) and "ACC" (accessory). The brand you find depends on the car. It will be a wise decision to read the car repair manual to avoid mishaps.

3. Disconnect battery terminals:There are two poles on the battery marked positive (+) and negative (-). Disconnect the negative battery at the pole. Be sure to loosen the screw before removing the battery posts. On the safety front, remember to secure the negative wire to prevent it from touching any of the terminals while the ignition is running.

4. Remove the steering wheel clips:Remove any clips you find on the steering wheel. You will also need to scrape off the plastic clips and remove the screws and bolts. After taking them off, keep them safe in a place where they will not be damaged.

5. Flywheel Removal:On some vehicles the ignition switch is located on the dashboard, on others it is on the steering column. Removing the flywheel is essential for this job, regardless of where the flywheel is located. If possible, use a steering wheel puller. Before you do this, you should read the repair guide.

6. Unhook the ignition module cover hooks: UBy unlocking the clips on the ignition module cover, you can remove the cover to gain access to the ignition switch. You may see some releases in the clips. Scrape off the hook releases with a screwdriver or pliers.

7. Put the key in the right position:Insert the key in the ignition switch and turn it to the accessory position. As explained above, this will free your car from the ignition module. Some people suggest using a screwdriver and you don't have your car keys, but I'm afraid I have to disagree with using a power tool of any kind. To avoid damaging your ignition switch, stay away from such tools.

8. Check the power button:Look at the switch to see if something is wrong. You will need a test lamp for this. Depending on the OEM, the dealer you bought the car from, and your needs, you may need to have the ignition serviced or buy a new one.

9. Check the cables:Check for positive voltage flowing from the battery through the vehicle's ignition switch. It's an easily identifiable thick red wire that's always live. Once you've identified it, insert the right spade end into the wire and hold it in place with a spade multitool. Now connect the power cord to the “BATT” port on the switch.

10. Únase al Kabelzubehör:Connect the accessory harness to the "ACC" terminal of the ignition switch. The cable is required to bring your electrical accessories to life when the ignition switch is turned to the "ACC" or I position.

11. Connect the jumper cable:Connect the starter relay lead to the ignition switch “ST” terminal. The "ST" terminal is energized only when the ignition switch is placed in the "START" position or position III.

12. Connect the ignition wire:Connect the ignition wire to the "IGN" terminal of the vehicle's ignition switch. The central terminal is the ignition, accessories, wipers and other conveniences of the car.

13. Reinstall the ignition switch:To install the new switch you will need to apply a little pressure to the release pin to turn on the new ignition. After that, install the new ignition switch on the steering column.

14. Time for a test: LLet's test our newly connected power button. Let's start by reconnecting the battery. Do not begin assembling any part or component until you are certain that the new ignition switch will function properly.

Insert the key and try turning the ignition to reconnect the disconnected negative battery terminal. If the ignition works fine, you've done something wonderful; If not, you need to repeat the steps.

15. Reassemble car parts:Once you've confirmed that the ignition switch is working properly, we need to reassemble the parts (which honestly seems super boring to me, but it needs to be done). Turn off the engine before removing the battery as you did at the beginning of the procedure.

Putting the pieces together isn't rocket science, but it can be tricky at times. Therefore, reading the car repair manual to learn how to assemble parts is a good option. Whatever you decide, remember to put the right components in the right place using all the screws, bolts and clips at your disposal as recommended in the manual.

That's all; If you follow these steps correctly, you shouldn't have any trouble connecting the power button.

frequently asked questions

What wires go to the ignition switch? The Ultimate Guide - CarsCounsel (3)

Below you will find frequently asked questions about which wires go to the ignition switch for information on important aspects involved.

1. Where does the power button get power from?

AnswerThe ignition switch draws power from the car battery and converts it into sparks capable of generating dueling vapor and starting the vehicle. However, this is not all; The ignition system works in sync with many components controlled by the car's internal computer system to start the car.

2. Does the ignition switch control the fuel pump?

AnswerThe ignition switch energizes the fuel pump and ignition system for a split second in the start position, allowing the vehicle to start.

3. What are the signs of a bad ignition switch?

AnswerYour car stops right after starting or it may stop while driving. If the key is in the same position and it fails, your vehicle is fine, but still after a while. Either way, this may indicate a problem with the ignition switch.

4. How can I start my car without the ignition switch?

AnswerYou can start your car without your key. However, I only recommend this if you've lost your key and don't have a replacement. To bypass the ignition system you need to connect the ignition wire to the battery wire and then connect the starter wire to the connector.

Final Thoughts -

That's all I wanted to say about the wires going to the ignition switch. The ignition system is one of the essential parts of a car's system. Like all other parts, they wear out after prolonged use.

Therefore, a faulty ignition switch can become a real inconvenience. The reason for writing the article was to enable you to turn on your vehicle's ignition switch when required. However, the key to not making a mistake when following these steps is to get hold of a universal ignition switch wiring diagram.

Thank you for reading. Have a wonderful day. Drive safely.


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