Skip the auto shop - Our mechanics make house calls

Q: Electrics died after warning light

asked by on

One night when I was driving home, the battery light lit up on the dashboard of my 2007 Ford Focus. I was close to home and thought I could make it there but when I was at a stop sign half a block away, all of the electronics died. I needed help getting the car into my driveway, which was very inconvenient. The car is just past 100,000 miles at this point, so I suppose the alternator lasted a decent amount of time. What can I do avoid having the same problem again in the future?

A: Your car’s alternator is mounted on the bac...

Your car’s alternator is mounted on the back side of your engine near the firewall and is prone to having oil leak on it from the engine valve cover. This can cause the alternator to fail prematurely. If your battery, battery cables, and terminals are not well maintained, they can also put a strain on and cause premature failure of the alternator. Besides replacing the bad alternator, the rest of the electrical components listed should also be inspected and repaired as needed. If you have aftermarket items such as a big stereo amplifier or radio that draws extra power, this could cause the alternator to put out higher amperage than would normally be required, leading to overheating and premature failure of the alternator.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Hazards not working rogue electrical issue!

Hello. If the turn signals are only working when you mash down on the button, then the issue is likely related to the button. If the switch is new, then the problem might be with the mounting of the switch....

Q: Car overheating all of a sudden.

First I would check your coolant level. Let your vehicle cool down and look in your coolant pressure tank. It should have a mark that tells you where the full level is. If it is low you have a coolant...

Q: My car jerks at 45-50 mph during acceleration, and then it smooths out.

Hi There, The jerking reaction you are describing may indicate a dirty or failing mass air flow sensor which is a unit that monitors air intake and relays this info to the ECM which then makes adjustments to the fuel...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...