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Because your car battery is weak. When the engine is running, your electrical systems (including your headlights) are running off the alternator, which generates electricity directly from the engine. It is intended to take over for the battery and also recharge it. It's entirely likely that you will have been stranded somewhere, unable to start your car, by the time you read this.
What else can I help you with?
Why on a 1999 Chevy Silverado when I turn on my headlights why does the dash lights go off?
They are supposed to dim try turning the wheel that brightens them up on the dash or the switch itself.
What is the lights on the back of a car called?
On the back of a car there are tail lights, turn signals, and brake lights. Cars also have back up lights that tell people when the car is in reverse.
How many types of car lights can be found?
On an average car, there are high and low beam lights for night driving, clearance lights on the front and back, front and rear turn signals, and back-up lights used when backing up.
Who makes jenni smile and brightens up her day?
Derek always brightens up jenni's day just by sayiing hello on texts and makes her smile until her mouth hurts.
What are the back-up lights for cars?
"Back up lights" are the same as reverse lights. Lights that "turn on" when vehicle is put into reverse gear to illuminate the rear of the car so you can see when backing up.
Why do the car lights turns on but the car don't?
They light up because of the filament in the light
Why does your fiesta side lights light up when you unlock car?
to alert you that the car has been unlocked
What does kellan lutz do for the earth?
Kellan Lutz brightens up the earth with his hotness!!!
I have a 2003 Hyundai Tiburon and when I lock my car up the tail lights in the back and the front come on without me turning them on. Why is that?
the lights come on to let you know that your car is locked
Do you like Naruto?
I think that Naruto is very awesome and that he brightens up anybodies day.
What causes the car to squeal when accelerated but not when breaking?
Sounds like a squeaky belt to me. Did your car sit out overnight or get wet. Does it go away when warmed up. Almost always the belt.
What is an automobile headlight?
It is a light on the front of a car or truck that lights up the road.
