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Ignition Switch – What is the main function?

Ignition Switch – What is the main function?

Ignition Switch Function

The ignition switch, also known as the starter switch or the start switch, is in control of the car – in all senses of the word. It controls your car’s main electrical systems, including the accessories, like the power windows, radio, headlights, interior cabin lights, and the air conditioning.


 

In modern cars with internal combustion engines, the ignition switch provides the required power to the starter solenoid and the other components within the starter system, like the engine control unit and the ignition coil.

 

The starter solenoid works with the ignition switch to engage the starter motor of an internal combustion engine. The engine control unit controls various actuators on the internal combustion engine by reading data from various sensors, transmitting this data to the ignition switch to efficiently power the vehicle. 

Ignition Switch Replacement

 

When looking at the average cost of the ignition switch replacement in your car, you can expect to pay between $125 and $175 for the average cost. The labor costs will average around $60, with the process often taking under nana hour to perform successfully. The parts will range between $75 and $210, costing much more than the labor regardless of the type of car you own. 

 

  • Ignition Switch Cost Comparison

 

When looking at the comparison of your ignition switch replacement costs, your mechanic will charge you between $109 and $275 for the entire process. If you would rather go with a chain auto body shop that can provide a standard service across various places, you can expect to pay between $117 and $289 at Midas. 

 

You can expect to pay around $110 and $194 at Midas at another similar shop, coming in much cheaper than Midas. NAPA will cost you between $129 and $304 for the total ignition switch replacement cost, being the most expensive option out of these three shops.

 

If you can do the work on your own or want to get the best deal for parts, Walmart will cost between $5and $214, with Amazon costing you between $45 and $203. 

 

  • Sample Ignition Switch Replacement Costs

 

When looking at the sample ignition switch replacement costs, we have given you some of the most common car models on the market today, so you can have an idea of how much you are likely to spend.

 

The least expensive options include the Nissan Altima, Toyota Corolla, and the Toyota Camry. These three cars come out to between $110 and $152 total, ranging between $52 and $67 for the labor costs and $58 and $85 for parts for the ignition switch.

 

The middle of the road options include the Honda Accord, Ford Fusion, Ford Focus, and the Ford F-Series. These four cars range between $129 and $275, with the parts ranging between $77 and $208 for the total cost. 

 

The most expensive cars for the ignition switch replacement are the Honda cars – the Honda Civic and the Honda CR-V. These two vehicles cost between $131 and $182, with the total parts cost ranging between $79 and $115 for the replacement. 

 

  • Ignition Switch Replacement Steps

 

If you find out that you have a faulty ignition switch, you need to follow the correct replacement steps to fix this problem as soon as possible.

Taking Apart the Interior

First, disconnect the negative terminal on your battery. The negative terminal will have a minus sign, or a “-” sign, and will be coming out of the battery’s top. Next, remove the trim around the steering wheel to prevent anything from getting in the way of the ignition switch.

 

Once this is done, take the steering wheel out of the car if it is in the way of the replacement. If you can’t gain access with the interior trim removed, remove the steering wheel by reading the info and the steps from your vehicle repair manual.

 

The next step is to release the clips on the ignition module cover to get the plastic cover out of the way of the ignition switch. 

Removing The Ignition Switch

The first step in removing the switch is to insert the key and turn it into the “accessory” position so you can release it from the module. If the key is stuck, this shouldn’t stop you from turning. 

 

The next step in removing the ignition switch is to press the release pin inside the ignition module hole. Once this is done, slide the ignition switch out. Remove it from the place beneath the steering wheel, making sure you get out any dust or debris that is clogging the area. When the ignition switch is removed, you might need to look into having the switch rebuilt if you can keep the same car keys. If your ignition switch can’t be rebuilt you need to purchase a new switch. 

Installing a Replacement Ignition Switch

First, when installing a new ignition switch, you need to squeeze the release pin on the ignition switch so you can side it into place inside the ignition module. Once this is completed, slide the ignition switch into its hole, pressing it in until you hear the click of the pin set into place. 

 

Once the ignition switch is in the right spot, reconnect the battery and test the new ignition switch. Make sure you test the switch before you reassemble the dashboard if you have missed an issue.

 

After you have tested the switch, shut off the engine and disconnect the battery once more. Now that you have confirmed the new ignition switch works, you can reassemble the dashboard and the interior, like the steering wheel.

 

Put the dashboard back together in the same exact steps in which you took it apart, but in the reverse order. Install the last parts of your removal first and go backwards from there. 

 

The last step in installing a replacement ignition switch is to reconnect the battery. When the dashboard is assembled, and the new ignition switch works, reconnect the battery to the battery’s negative terminal. 

Faulty Ignition Switch Signs

 

  • Engine Stalling

 

One of the most obvious signs of a defective ignition switch is the car stalls while driving. Your engine stalling is a severe issue that needs to be fixed as soon as possible to prevent any further damage and performance hindrances. There are certain instances where you can determine the reasons why your car stalls while driving to prevent the defective ignition switch.

Causes of Engine Stalling

  • Electrical wiring – make sure you check the car’s dial speed control system. Make sure that the wires are correctly connected, and they are not rusting. If the wires have caused your car to stall, this can be a clear symptom of a defective ignition switch.
  • Fuel pump – The fuel pump might show signs of why the car stalls while driving, like a slight buzzing noise while it is running. If you do not hear any noises during the fuel pump being engaged, then this is likely that you have a bad fuel pump, causing your car to stall and a defective ignition switch. 
  • Bad battery – The car battery is the rechargeable battery that supplies the necessary electrical current to a motor vehicle, with the main purpose to feed the starter, which in turn powers and starts the engine to run your car. If the battery is dead, your car will not start, and you will have a defective ignition switch. 

 

 

  • Problems with the Car’s Accessories

 

Another sign of a broken ignition switch is having trouble turning on your vehicle’s accessories, like power windows, radio, headlights, dashboard lights, blinkers, etc. When you put the key in the ignition lock cylinder and turn the key, the switch should do its job and power on the vehicle's accessories, like the interior lights. However, if the parts do not turn on after the eye has been inserted, this is a clear sign of an issue with the defective ignition switch and a potentially faulty ignition lock cylinder.

 

  • Key Won’t Turn in the Ignition

 

This is a very noticeable symptom of a defective ignition switch. The first thing you need to do to start your car besides sitting in the driver’s seat turns the ignition lock cylinder key. However, if the ignition switch has damage inside of it, it will sometimes prevent the key from moving at all – thereby preventing your car from turning on and your engine from revving,

 

  • Dashboard Lights

 

If the ignition switch is the problem, the dashboard lights might go dark when you place your key in the second position. If the lights go out when the key is moved, there is a problem with the wiring or a defective ignition switch. Make sure you bring your vehicle to a mechanic or qualified electrician to determine the root cause of the flickering dashboard lights.

Conclusion

 

When looking at the igniton swtich, it is crucial to konw the function of this mehcanism, the signs of a broken giniton swtich, and how a damaged igntion swtich can harm your vehicle.