Q: new alternator and battery. Car wont start, any pointers?
So i've recently bought a new alternator and a new battery for my car but the red battery light still lights up. And now my car wont start. Can you help me?
My car has an automatic transmission.
Recommended Services
| Instrument Voltage Regulator Replacement | $207.87 - $439.61 | Get a Quote |
Hello. This may be related to either a bad ground connection from the battery or potentially a bad voltage regulator. The other end of the black battery ground cable should be connected to the chassis of the car firmly. If this is not the case, this may potentially cause this problem. I would also recommend having the voltage regulator tested to see if it is working properly as well. If this is bad, it will also cause the light to come on as it will not charge the battery properly.
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
What others are asking
What tips should I know about using the hands-free system?
Your car’s hands-free calling system lets you take and make calls through the audio system without having to use your cell phone. This can reduce distractions while driving, offering you and your passengers greater safety on the road. However, there...
Battery Drain on 2012 Honda Civic
Using a trickle charger can be good for cars that are only driven occasionally, but in this case it would just be masking a larger problem. You likely have a parasitic draw on the electrical system, though you should have...
How do you remove rear seat armrest cup holder?
You may not be able to remove the arm rest without removing the entire door panel (https://www.yourmechanic.com/article/how-to-replace-a-car-door-panel-by-robert-tomashek) first. Depending on vehicle, you may only have to remove a couple screws and the door panel will lift straight up and off....
My car just cut off while driving and won't start again
Hello there, a few different faults can cause your 2005 Nissan to shut off while driving. A failing fuel pump is one of the faults that can cause this. Other likely problems would be the battery (https://www.yourmechanic.com/services/battery-replacement), alternator (https://www.yourmechanic.com/services/alternator-replacement), battery...
Smoke from the hood - 1996 Ford Mustang
Hello there. You will need to see if the engine valve covers are leaking oil and running back on the exhaust or if the transmission is leaking oil onto the exhaust near the dipstick tube where it goes in the...
car jerks/gas pedal
Hi, thanks for writing in. This is more than likely a fuel delivery issue, given the symptoms you describe. The idle air control valve (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-idle-control-valve) is a unit that regulates the air flow into the engine as it is mixed...
Gasket and valve cover replacement Infiniti M35 2006.
Billing question was sent to CS for the cost of replacing the valve cover gaskets on a 2006 Infiniti M35 with a V6-3.5L engine.
computer will not talk to altenator 2011 vw routan
Hi there. Each mechanical and electrical system in today's vehicles are monitored and in many ways, controlled by a series of sensors and electrical connections that send and receive data from the ECU in order to work effectively. The alternator...
it won't start unless I major pump gas. Check engine light on now. Smell/see small oil or gas leak in engine by carb. runs fine
Your engine is fuel injected, so there is no carburetor. Pressing the accelerator pedal is not normally required to start a fuel injected vehicle. However, if you have noticed that holding the pedal to the floor while you are cranking...
Related articles
Can Sensors Be Cleaned or Do They Need to Be Replaced?
In In most cases, sensors for your automobile will need to be replaced if they fail, but depending on the type of sensor and its location or function, some can be cleaned and reused (https://www.yourmechanic.com/question/can-sensors-be-cleaned-or-do-they-need-to-be-replaced). Sensors can come in many...
The Most Common Error Codes for Transmission Problems
If your Check Engine Light has come on, there are a number of conditions that could be causing it. Many are related...
10 Best Miniature Jumper Packs For Your Car
Jumper cables and jumper packs charge your car battery when it needs a boost. The NOCO Genius Boost Plus is the best spark-proof, miniature pack.
Browse other content
Services
Maintenance