All drivers have dealt with a car battery dying before, but what should you do if the car has no power at all? Let’s look at the most likely causes of electrical issues and what you can do to fix these problems.
Common Electrical Problems In A Car
A dead car battery is the most common culprit behind a power loss. There are other causes detailed below, and all these issues are typically only revealed after a complete diagnostic evaluation.
Dead Car Battery
Sometimes, when a car battery dies, it is possible to still get some power to the car. However, if the battery is completely dead, you will not be able to turn on anything.
The majority of car batteries will last anywhere from three to five years. If the battery fails before that time, there could be another factor behind the failure.
Repair/Replacement Cost: Both extreme heat and cold outdoors can take a toll on your car’s battery. A full battery replacement will cost anywhere from $342-$352.
Main Fuse Is Blown
A fuse box is located inside your car’s cabin. Many of the electronics and car parts will run through this fuse box.
There is also one located under your car’s hood, which is known as the power distribution center. These fuses run the computers, accessories, and other essential components of the car. If one of the main fuses fails, you could be left without power.
Repair/Replacement Cost: Replacing a blown fuse is a task best left to the auto care professionals. Drivers can expect to pay around $125 for a replacement.
Faulty Ignition Switch
When you turn the key in the ignition, the car accessories will receive the power that’s needed to run the car. If you cannot get power to anything, it is typically caused by a faulty ignition switch.
There are other ignition components that are part of the system, but they should not result in a complete loss of power. If the ignition coils or module fail, you will still have access to the battery power which can run the headlights, stereo, and various other features.
Repair/Replacement Cost: Most ignition switches cost $120-$250 to replace.
Bad Alternator
Your car’s alternator is responsible for charging the battery while your engine is running. If it ultimately fails, the battery loses its power and you will not be able to start the car or power any of its features.
The majority of drivers do not realize that the alternator is failing until they charge the battery and the issues arise once again. You may replace the battery only to discover later that it was the alternator creating the problems.
Repair/Replacement Cost: Replacing a bad alternator can be costly but it is undoubtedly necessary. In most cases, this will cost between $608-$790.
Starter Doesn’t Work
The starter helps get the engine running when the key is turned. If the starter fails, your car will not start up. Plus, without the car running, some parts may not have any power.
However, if you can turn on the ignition, there should be a few features you can run. With a charged battery, you should be able to turn on the headlights and the stereo.
Repair/Replacement Cost: To replace a starter, drivers can expect to pay anywhere from $428-$581.
Battery Cable Is Loose
If the battery is alive, but still causing problems, there may be a short in the system.
A loose battery connection can prevent the car from starting, leaving you without any power. If the connection appears correct, corrosion may be to blame.
Repair/Replacement Cost: The average costs to replace a battery cable are between $385-$442.
How To Fix Car Power Issues
To properly fix the electrical problem, there are a few steps to take. However, if you are uncomfortable with any of the tasks, it’s crucial to contact an auto care professional in your area.
Check Condition Of The Car Battery
Begin by simply checking the car battery. It may be time to replace the battery if it is more than three years old. A battery replacement normally costs between $85-$250.
You’ll need a multimeter to check the battery yourself. Turn the car off and have the probes touching the battery terminals. The multimeter should read 12.2-12.6 volts. If it does not, it’s suggested to hook it up to a battery charger.
Test Battery Cables
If your battery does have a charge, you should check the connections. Look for any signs of corrosion. This can be cleaned off with a mixture of water and baking soda.
Now is the time to tighten the connections or cables if any appear loose. Always remember to use caution whenever you are working with a car battery.
Inspect The Fuses
Use your multimeter to check the fuses by setting it to Ohms. Touch the leads to the fuse terminals, and if an OL reading appears, it means the fuse is blown.
At this time, you’ll have to replace the fuse, which typically cost a maximum of $25 each.
Check The Ignition Switch
You’ll need more expertise when diagnosing a bad ignition switch. Start by finding the electrical connection to the ignition switch. It is typically found in the steering column.
Disassemble some trim pieces to find the ignition switch. Check for burnt or broken wires that could be causing the issue.
Diagnose The Charging System
The alternator could be to blame if you cannot get the battery to charge while the engine is running.
If you can get the car running, test the alternator with the multimeter. With your engine running, your multimeter should read 13.5-14.5 if everything is working properly.
Contact The Auto Care Professionals
It’s not always easy to diagnose a car’s electrical issues. Thankfully, the experienced team at Heath’s Auto Service can help!
*These are cost estimates according to RepairPal. Contact our Scottsdale, AZ location right here!
Heath’s Auto Service In Scottsdale, AZ
At Heath’s Auto Service, we offer a comprehensive range of services and repairs to meet all your automotive needs. From routine maintenance like oil changes and tire rotations to more complex repairs involving brake systems, engine diagnostics, and transmission issues, our highly skilled technicians are equipped with the latest tools and technology to ensure your vehicle is serviced to the highest standards. Contact our team today!
