Skip the auto shop - Our mechanics make house calls

Q: Try to start car, no power.

asked by on

My battery cables were lose to where I'd have to hit the positive terminal to be able to start the car. After leaving my car sit overnight, it dies and doesn't start back up. Immediately after connecting the jumper cables my car starts right up. I leave it sit for 10 min and disconnect them and let it idle. Once I put my car in drive or turn on my headlights the car instantly dies. I heard my tape deck making noise like it was ejecting repeatedly and even when I look at the battery I can hear A slight humming.

My car has 196000 miles.
My car has an automatic transmission.

Hi there, A loose terminal will prevent the alternator from properly maintaining a charge. Also, a weak or failing alternator will cause the engine to stall when you have described as the voltage and amperage outputs would be greatly reduced and any load on the electrical system will result in the engine stopping. Test the battery for a state of health, bad cell, and low cold cranking amps. Test the alternator with a load test to confirm whether or not the voltage and amps output is where it should be. Based on what you’ve described, the alternator is now failing and the battery may no longer be able to hold a sufficient charge. Your Mechanic has several available technicians to assist you with a no start inspection, battery replacement, and alternator replacement.

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: Radiator leak

The radiator in your car is most likely leaking from one of the plastic tanks and not the aluminum core part of the radiator. The tanks on these radiators are not repairable and the radiator will most likely need to...

Q: Is my clutch safety switch broken?

Hello. These 2 problems should not be related. A clutch safety switch stuck in the "pedal depressed position" (or a switch that has been unplugged and a wire connected across the 2 terminals) will allow starting without depressing the clutch....

Q: OBD-II failed for smog check

Unfortunately without more information as to why your Toyota Corolla did not pass the emissions test, it is difficult to determine the cause for the failed smog check. Provided that the ODB2 port itself has power and is allowing the...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.