Bad Starter Solenoid

Bad Starter Solenoid – How To Diagnose This Problem?

If you are having an issue starting your vehicle and you hear a clicking sound but nothing works. Maybe you have a bad starter solenoid.

This solenoid is responsible for transmitting the cranking power to your starter motor. And if this solenoid is not working, you are probably not going to be able to start your car and go to work. This is a big issue because it can leave you stranded and, you may miss some of your daily routine obligations.

This bad starter solenoid can also be misinterpreted with some common electrical problems that happen to our car, like a drained car battery and corroded battery terminals, problems with the starting circuit, and even locked engines. Yeah, that’s right, locked engines can make that click sound but unfortunately, nothing happens because the pistons are frozen.

Because of these issues, it is important to know how to troubleshoot and instantly notice that the problem is a bad starter solenoid and not something else. If you experiment with many different options and replace everything, the repair may cost you a fortune.

That’s why we are here and we dedicated a whole article on this problem. In this article, we are going to cover everything you need to know. Starting from what is a starter solenoid and what is its role. What are the main symptoms of a bad starter solenoid? How much is going to cost you to fix and what is needed for you to get this problem fixed. We also going to cover some steps on how you can diagnose and fix this problem by yourself. So, if you are interested and want to learn more, follow along!


What Is A Starter Solenoid?

The starter solenoid is one of the most important pieces of the puzzle. Without it, you wouldn’t be able to start your car and go to work.

The starter solenoid is responsible for receiving power from the battery. Then it makes sure that the electric signal travels to the starter. Then the starter cranks your car and starts your engine. The electrical circuit will never be complete without the starter and the engine will be impossible to start. That’s why we said that this is the most important piece of the puzzle.

Besides transferring the electric signal of the battery to the starter. The solenoid is also responsible for the creation of an electromagnetic force. This electromagnetic force generates enough mechanical force that moves the pinion. After the pinion is moved from the start position. The engine’s crankshaft turns and the combustion process begins.

This solenoid is made to be tough and can withstand almost anything. Because it is a crucial component, manufacturers don’t want to put in cheap solenoids and ruin their reputation. That’s why these solenoids are made to be tough and can go for a few hundred thousand miles. Although with age they are known to go bad. Especially, in models that are past 10 years old. The materials inside go bad and issues like a bad starter solenoid may start to appear.

Where Is The Starter Solenoid Located?

For someone inexperienced, the starter solenoid can be hard to find inside the engine bay. Namely, because it’s simply tucked away under some components. Especially in V8 engines, the solenoids are mounted under the left or right bank. And with so many plastic pieces around. You can easily get confused if you are trying to locate the starter solenoid for the first time.

Old engines are the simplest and you can easily find the solenoid without any hassle. They have so much space to work on, and you can identify the starter solenoid right away. But, considering that you have a modern car. We made a small manual on how you can find the starter solenoid.

Take a camera flashlight and open up your hood. If you look deep inside your engine bay, you will notice a big cylindrical device mounted on the side of the engine. The starter is usually mounted on the left side. But you can never know where some manufacturers put these starters.

The big cylindrical thing that you see is the starter. The starter is always bigger than the solenoid.

The starter solenoid is mounted right above the starter motor. The solenoid also has a cylindrical form and is strongly fitted to the starter.

It is also useful to google this information. For example, you type the make, model, and engine that you have and you add “solenoid location”. Plenty of pictures will pop up and will instantly tell you where to look.

After this step, you probably found where the solenoid and the solenoid starter are located. Before we go even further into troubleshooting and replacement. Now we can discuss some of the symptoms of a bad starter solenoid.

Symptoms Of A Bad Starter solenoid?

Like with every electrical component, so does the starter solenoid develops symptoms before it fails. Electrical components are designed in such a way to inform you before they die off. So, the starter solenoid will show some symptoms before it says, I’m off.

You are having the main role here to detect these symptoms of a bad starter solenoid. If you don’t detect them, the starter solenoid will die all of a sudden, and your car won’t start. You wouldn’t even be able to take your car to the mechanic’s shop.

And also, it’s going to cost you some money to call road service. Because you will have to pay them in order to tow your car to a mechanic’s shop. So, it’s better to learn these common symptoms that we are going to discuss next, now let’s begin.

Rapid Clicking Sound Comes From The Solenoid

This symptom is probably one of the most common, and that is your solenoid produces a rapid clicking sound when you turn the ignition key. When you first hear this rapid clicking. It may surprise you, and it’s good to identify from where the sound is coming.

Open the hood and inspect from where the clicking sound is coming from. This will help you locate the starter and the solenoid on the motor. See if there is any damage to it. Make sure that everything is ok.

Bad Starter Solenoid

If everything is alright and the solenoid still continues to click when you are trying to start your car. The best solution is to take your car to your local mechanic as soon as possible. The solenoid needs to be checked with a multimeter, to make sure that this is the culprit.

The electrician will check the starter and will diagnose the issue. If you have an ohmmeter, you can even diagnose the issue yourself. We will discuss later how you can do that. It needs to be diagnosed because you can’t know for sure if it’s the solenoid starter. Because this rapid clicking sound can be caused by other wiring issues as well.

This rapid clicking sound appears because the solenoid does not receive enough electrical current. So, the components that come before the solenoid need to be inspected as well. By these components, we mean the battery and the wiring. They all need to be checked before we determine the real culprit for this issue.

Single Click

In some instances when you turn the ignition you can hear only a single click from the starter. This click means that there is no power into the solenoid to spin the starter. A lack of power can be caused by many things. One of these things is a bad starter solenoid. The starter solenoid as we said, is one piece of the puzzle that makes the ignition system. If it is broken it means that the ignition won’t work.

If a single click happens and the car does crank, it can also be a sign of a bad battery. A bad battery will cause this single click sound. It happened to me once, I had to replace the battery. That’s why a single click sound needs to be investigated first before jumping to conclusions. If this happens to you, the first thing you should look at is the battery and see if the connections are good. See if there is any corrosion buildup on the terminals. Give it a good cleaning and also test the battery. If the battery doesn’t hold electricity you can move to the starter solenoid. Later we are going to explain how you can troubleshoot this issue.

Nothing Happens When You Turn On The Key

If this situation happens to you. Maybe your starter solenoid has decided to call it quits. If this happens, make sure that your electrical systems inside the car are working properly. Check the radio, the dome lights. The dash lights. Run them for a while. If they work it means that the solenoid can be the culprit.

If the lights in your car turn off and you not getting any lights on the dash. It means that your battery is done. In this case, you will only need to get a new battery. Getting a new battery is a simple job to do. Make sure that you have the correct left and right terminals for your car. And also, pay attention to the power that you need. Because not all batteries are the same. Make sure that the battery is powerful enough to run your car. A good battery will set you back around $100 or more. Make sure that you get a good quality brand. Cheap batteries do not hold power like more expensive batteries.

The next thing to do is to unbolt the positive and negative terminals. Unhook the cables, then remove the battery and replace it with the new one. Simple as that. Bolt the terminals and make sure that they are tight and you are good to go.

Sometimes The Car Starts Sometimes Doesn’t Start

This can also be an issue, especially if the starter solenoid doesn’t want to give up. Sometimes it may start and sometimes it may not. You are basically left at the mercy of your starter solenoid. If he decides to give up, you won’t be able to start the car and do your important business.

The best thing in this situation while the car is running is to go to a mechanics shop. Look for a shop that focuses on electrical problems. They will inspect the car and troubleshoot the issue. Or if you feel that you are mechanically inclined you can do this job by yourself. If not, don’t wait. Because you don’t know when your car is going to leave you stranded.

What Causes It To Go Bad?

Like with every component, so does the solenoid suffer from outside factors. These factors can include human error or natural causes. In this chapter, we are going to elaborate on what causes the starter to go bad.


Moisture is a nightmare for electrical components. If you want to save them, you always need to keep your engine bay free of moisture. Make sure that everything is sealed properly. Clean all the dirt from your windshield. Don’t leave debris to form, especially leaves. They will clog up your drains and can cause flooding. If you get water on your starter solenoid it may cause it to short out and die.

Also, take note that you have your under tray installed also. This plastic is a lifesaver, especially when you are driving in some deep puddles. If you don’t have a shield, the water will splash inside your engine bay and it could mess up your electronics.

Bad Wiring

Bad wiring can also be one of the issues that cause your starter solenoid to die. Old wiring especially, or wiring that someone has been messing with. Maybe your solenoid was swapped and the person that installed didn’t connect the wiring properly. This may cause a bad connection and can also cause the solenoid to die.

Bad battery wires can be one of the reasons why this can happen. They corrode with age and do not pass electricity as they used to. Make sure that you clean all of the rust that is formed on the terminals to keep the electricity moving.


Heat can also be a factor. Especially if your engine overheats regularly. If your engine bay does not have enough cooling and fresh air. The components like the starter have the tendency to overheat. This usually happens in places where the climate is very hot and where the temperatures are sky-high. Even the summer is a great danger when it comes to starter solenoids.

Also, heat can be generated if you run high currents all the time. When you are trying to crank your car and the car stubbornly doesn’t want to start. Don’t be persistent while starting a vehicle. Crank it a few times and that’s it. It doesn’t want to start. After a few minutes give it another try. The solenoid needs to cool off. Because you are transferring a big amount of power to it and also a great amount of heat.


Age is also one of the attributing factors that can cause a bad starter solenoid. If your car is more than 10 years old, it is very probable that you are going to have a starter issue sooner or later. The best thing is to notice these issues on time and fix them before they leave you without a car for a couple of days.

How To Test The Solenoid DIY?

You are probably here because of this chapter. Everything you need for testing the solenoid is a multimeter. A multimeter is a specialized tool that will help you to measure resistance. Multimeters are fairly cheap and can be found in most hardware stores.

In order to perform this procedure, you need to follow a couple of simple steps. Here is also a video how you can test these solenoids.

Step 1

Make sure that your ignition is off. You don’t want to test the solenoid with the ignition key turned on.

Step 2

Make sure that you set your multimeter to the ohm setting.

Step 3

Make sure you disconnect the cable from the solenoid’s M terminal. This is the terminal that attaches to the cable that is going to the starter motor.

Step 4

Connect one of your multimeter probes to the S terminal. This is the terminal that receives power from the ignition.

Connect the other probe to the M solenoid.

Step 5

Check the readings. If your multimeter reads out of limits OL. The solenoid is bad and needs to be properly replaced. In the next chapter, we are going to discuss that. We will learn how to replace a bad starter solenoid.

How To Replace Bad Starter Solenoid DIY?

After you inspected your starter solenoid and you are sure that it’s faulty. Now it’s time to replace this solenoid and fix your starting issue. This is a fairly simple process and we are going to describe it in detail. Here is also a video of this process

Step 1

Unplug your battery. Make sure that there is no electricity in the car. You can also try to crank the car without the battery, so there is no electricity.

Step 2

Get a new solenoid. You can get these solenoids from any parts store. Make sure that the solenoid is made for that car.

Step 3

Since you disconnected the battery. Now is time to disconnect the cables that go in the solenoid and starter.

Step 4

After you disconnected the solenoid. Unbolt the bolts that are holding the starter and remove them from the car.

Step 5

Take off the old solenoid and be sure that you don’t lose the spring that is connected to the solenoid.

Step 6

Mount the new solenoid on the starter and then mount the starter to the engine. You basically repeat the removal process in reverse order.

Step 7

Then you connect the cables in the right way, make sure that you don’t mess up.

Step 8

Connect the battery cables and crank the car.

How Much Does It Cost?

Replacing the solenoid is going to set you back for around $400-600. If you do the job by yourself, you are probably going to get a better deal. But this job is not recommended for beginners that do not have electrical knowledge. Remember that dealing with electricity is quite dangerous and you may get yourself in trouble.

If you are doing this by yourself. Make sure that you unplug all the battery cables and you are having no power in your car. This way you will be safe from hazards.

What if I don’t fix the solenoid?

It’s your call if you should fix the solenoid or not. The thing is that you will be left without a car if you don’t fix this bad starter solenoid. These solenoids are not some parts that can wait for you to get money and fix them. The solenoid will either work or not work at all.

If you need the car and your solenoid dies, this is the worst-case scenario. If you have one car and don’t have a replacement this can be a tricky situation. You will have to call for an Uber to get you or maybe a taxi. So, it’s better to fix your solenoid.


The starter solenoid issue can be really annoying. Especially when you need the car the most. If you want to get around it, make sure that you follow our steps and you learn how to read the symptoms. The clicking sound, if sometimes it starts and sometimes doesn’t. These are all symptoms of a bad starter solenoid.

We also covered a lot of detail on which are the main culprits that make the starter solenoid die. These are heat, age, and moisture. Make sure that you are clear of these issues and your starter will probably work just fine. Don’t crank your car too much if it doesn’t want to run. This puts a lot of stress on the starter.

And finally, we covered how you can diagnose the issue and replace the solenoid by yourself. This will be handy if you have a project and you want to experiment. But be careful. Make sure everything is unplugged and no power is in the car.

Approved Tools

These tools have been tried and tested by our team, they are ideal for fixing your car at home.

1 Comment

Leave a Reply

Your email address will not be published.