If the powder is luminescent or phosphorescent, it will glow in the dark for a period of time after the light is turned off due to stored light energy being slowly released. If the powder is just regular powder without any special properties, it will remain dark once the light is turned off.
It is not supposed to be on when engine is running unless there is a problem.
When a check engine light comes on, it means that there are issues with the engine. It gets turned off when the person resolves the problem that caused it to turn on.
it comes back on after about ten minutes
The light can not be reset without fixing the cause of the code that turned the light on.
If the oil light comes on but the oil level is ok, the problem may be a faulty sending unit, as it turned out in my case.
Yes it is.
It means you have the traction control turned off or the TC is engaging.
An hour without light typically occurs at night when the sun has set. It can also happen during a power outage or if you are in a dark room with no artificial light sources turned on.
You can test a light switch without removing it by using a voltage tester or a multimeter to check if there is electricity flowing through the switch when it is turned on.
You can try disconnection the battery for 10-15 min but if there is a problem that turned the light on to begin with it won't go away without the problem being fixed.
The Traction Control Light comes on every time you turn on the ignition. It should go off as soon as you start the engine. If it does not, then you have the traction control turned off. Turn it back on and the light will go off. If you have the Traction Control turned on and the light stays lit, then there is a problem with the traction control.