Wipers
You can adjust the headlights on a Saab 9.3 using the switches inside of the car. There should be a function to turn the highlights on, off and bright.
No
You should flick the headlight switch after you turn the car on.
Deacrese
Your headlights should be on whenever it will make a difference on the road. If you can look at the road and be able to tell that your headlights are on/off, then they should be on. Some states, such as New York, require headlights to be on when visibility is limited, such as in rain or fog, even in the day, regardless of whether or not you can see them on the road. In fact, one of the criteria for headlights is whether or not you are using your windshield wipers. At dusk or, in some states where mandated, when it is raining or foggy and you need to turn on your windshield wipers.
the low beams should turn on when the motorcycle is turned on
when it is raining or at night. Also generally when it is dark.
You should turn on your car's headlights at dusk and when it is raining. It is also a general practice to turn your headlights on when in a funeral procession. You should check with your local motor vehicle bureau, since regulations may be different in the area you will be driving.
Your headlights should be on whenever it will make a difference on the road. If you can look at the road and be able to tell that your headlights are on/off, then they should be on. Some states, such as New York, require headlights to be on when visibility is limited, such as in rain or fog, even in the day, regardless of whether or not you can see them on the road. In fact, one of the criteria for headlights is whether or not you are using your windshield wipers. At dusk or, in some states where mandated, when it is raining or foggy and you need to turn on your windshield wipers.
Well it depends if you're having the old cars it is probably going to go down in speed when you turn the headlights on. If you have models 3 years or less it wouldn't slow down.
turn on your headlights
turn on your headlights