Q: Alternator problems. Lights and horn don't work.

asked by on December 18, 2015

My car's alternator is not receiving power from the battery. When I turn the ignition, nothing happens, including no headlights or interior lights, the horn also doesn't work. The alternator is new and the battery was recently charged.

Your car is showing all the classic signs of a bad battery. I would recommend having a mechanic inspect the battery. They will start with the battery and have it load tested. When batteries get old they may not take a charge. If the battery is good the mechanic will need to check the battery terminals, making sure they are clean and there is no corrosion on them. After that the mechanic will need to check the main fuse.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Engine cranks, does not start.

Hi there! There are a few possible causes for your concern. Your engine needs several things in order to run properly. Fuel from the fuel tank, spark from the ignition system to ignite the fuel, and pressure in the cylinders...

nissan xterra anti theft issue

Hi there. In some case, when a professional mechanic is not able to connect an OBD-II diagnostic scanner to the ECU, it's an indication of a blown fuse or electrical relay. In other instances, it's due to the ECU being...

I just replaced my idle control valve with a new one and the idle continues to go up and down. Why?

It sounds like you may have either installed a faulty idle control valve or you may potentially have a bad connector or wiring running to the idle control valve. You can test the functionality of the valve by checking its...

Related articles

How Long Does an Ignition Ignitor Last?
The The ignition system of a car is responsible for kicking off the combustion process. Without the ignition coil on your car giving off the necessary spark, the air and fuel mixture in your engine will not be able to...
The Top 5 Selling Cars in Florida in 2012
Florida Florida offers great weather year round, and the fact that snow and ice never factor into the equation means drivers don’t have to focus on the overall vehicle handling as they do in other states. The best selling cars...
How to Start a Car in Cold Weather
Battery, oil, and fuel problems can make a car difficult to start in cold weather. Find out how to prevent starting issues related to weather.