Skip the auto shop - Our mechanics make house calls

Q: Headlights stay on permanently

asked by on

My headlights stay on permanently, and a number of interior power outlets are not working.

It sounds like you may have an electrical short somewhere in your lighting system. The short is most likely a short-to-power rather than a short-to-ground. The two circuits may have collided at some point within your wiring system. If the power outlets do not work, it is possible that the power that would normally be sent to the outlet is now being used to power the headlights constantly. Power outlets have a constant twelve volts whereas headlights only receive twelve volts when they are turned on. Unfortunately, the only way to really check this is to have a wiring diagram. Once a diagram has been obtained, have a certified technician inspect your electrical system using this information. Most likely the technician will need to trace wires in order to locate the issue for your headlights.

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: Hissing noise when brake pedal depressed.

Hello, the hissing sound is an internal vacuum leak with in the brake booster. The booster uses vacuum to assist with the brake pedal apply. You will need to replace the booster. If you'd like, a certified Your Mechanic...

Q: excessive fuel consumption I put genuine spark plug and wire plug set it was 125 lm now 145 km per 20 liters?what is problem how c

Hello. It is difficult to get much better fuel economy then what you are currently getting. The only way is by driving the car easy and maintaining it. Using synthetic oil, a high flow air filter, making sure that the...

Q: Passenger headlight wiring issues

If the area is fairly open, parts do not have to be removed to gain access to the terminals where the connector has to be repaired and if the broken wire is the only issue (defect) in that headlight circuit,...

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.