Check the fuses, if the fuse is blown you may have a short in the running light circuit.
All of these parts run on electricity, and for all of them to fail would be bad. Bad or burnt wiring could cause them not to work, or a alternator going bad could cause them not to work as well.
brake light switch would be most common cause
fuse, bulbs
the daytime running lites go out when you put the trans in park. they also go out when you depress the parking brake. i would start looking there.
light sensitive sells
emergency blinker
Most likely a blown fuse
probably the fuse is blown.
If the parking/tailight fuse is good - then it may be a bad headlight switch No tail lights but the bulbs are working? Please explain.
Some makes of cars have their lights on all the time, usually if the manufacturer is Swedish, where daytime-running-lights (or DRL) are mandated by law. If you check the cars which have lights on during the day, you'll notice they'll be Volvo, Saab or some other Nordic manufacturer.
check fuse for the running light module.
I would check the running lights for one with a short. I had the same sort of thing with my trailer and I spent way to much time troubleshooting the brake and signal wires. Turns out a running light bulb connector was grounding out on the trailer and messing it all up.