Skip the auto shop - Our mechanics make house calls

Q: Do I need to replace alternator

asked by on

I drain the battery on my truck last week. I trickle charged it and was able to start the truck but after 30 seconds it began to bog and eventually died. Do I need to replace my battery or the alternator ?

A: Hello. From what you’ve described, you may ...

Hello. From what you’ve described, you may need to charge and load test the battery to make sure it is good. Then do a charging system check to see if the alternator is charging sufficiently. You cannot check the charging system properly with a bad battery. A bad battery may damage a good alternator. If you need help with fixing this issue, have one of our mobile technicians diagnose the issue with your battery for an accurate repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Q: Can i travel with my mercedes c180 kompressor if i have battery/alternator problems appeared today?

Depending on what kinds of problems specifically you are referring to, I would generally not recommend driving far with this kind of problem as the alternator and/or battery can work very intermittently when they become faulty which can easily leave...

Q: 25 amp fuse blows after it's charged

When the battery was hooked up incorrectly, something must have been fried in the computer or other wires. You can find wiring diagrams in service manuals that are dedicated to your specific vehicle such as Chilton, Haynes, or factory specific...

Q: How Does a Mechanic Check a Car Alternator's Voltage Output?

The first thing a mechanic will do is to check the battery cables to make sure they are clean. Then the battery is checked to make sure it is at the proper voltage of close to 12.6 volts, using a...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...