turn it off
Depending on the situation needed to turn it off.
You should turn off all lights that you are not using.
You should turn off the light, but you should provide a different heating source at night for most species.
It's recommended to turn off ssid broadcast.
Generally cruise will turn itself off when the car is turned off, but it is always good to be sure, I always turn it off when I am not using it.
On.
no
They should turn off when the ignition is turned off and the key removed.
ETC should be kept on unless you have a reason to turn it off. Consult with your owners manual to see the specific reasons to turn it off. (i.e. Stuck in mud or snow)
Yes, you should turn it off.
If you are driving with your bright lights on and can see an approaching vehicle, you should turn off your bright lights immediately.