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If the car/truck is running, it will not make a difference. However, if there was an electrical short on one of the wires that leads back to the brake lights, it might slowly draw power while the engine is off.
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Brake lights drain battery on Nissan Quest?
Check switch under pedal & make sure is turning off when not applied.
Where do brake lights draw their energy from?
Brake lights draw their energy from the vehicle's battery.
Why do the lights drain the battery on the Honda 400ex?
The head lights are the biggest long term drain on your battery. (The starter is a heavier drain, but you can't leave it on for very long.)
What can I check on my Chevy Silverado to see why my brake lights aren't working?
the connection between the battery and the brake lights
Why might a car wont start if the lights stayed on?
you drain your battery when you leave your lights on
Why would the brake and battery lights on a '92 Corolla come on intermittently after you replaced the alternator and cleaned the battery cables?
You probably have a bad ground. Check the grounds on the brake lights.
What would cause the rear parking brake lights to stay on and drain battery of 1992 Lumina when car is turned off?
The brake lights will stay on if the switch is either out of adjustment or damaged. Pull up on the brake pedal to see if it will go out, if it does, you might be able to get by just adjusting the position of the brake light switch. BTW, it's on the brake pedal mechanism, under the dashboard.
What does it mean when the brake and battery lights come on in 1988 Toyota corolla?
Do you mean What does it mean when the brake and battery lights come on in when it is already started? Check your alternator may be its not working well it cause the battery sign comes out.
Why does your battery drain when you leave your tailgate open?
that keeps the dome lights on
What if your brake lights are stuck on can you unplug 1 side of your battery on a 94 mercury villager?
"Stuck" brake lights indicate that the brake light switch on the brake pedal is broken. It should be replaced.
Why has all of your brake lights gone out on your ls 400?
Battery dead
Can a door ajar light drain battery?
Yes, if your car sits a few days at a time and your cars interior lights periodically come on it will drain your battery.
