I don't have power. Is there an on/off switch?

check the brake switch with a test light you should have power all the time on one wire and only power on the other wire when the pedal is pushed. if you don`t have power all the time check fuses, if you don`t have power on the other wire the switch is bad, if this is good then check the sockets at the rear to see if you have power and ground. if not then you have a wiring problem between the switch and the socket and you will have to find the break starting at the back of the socket and move towards the switch checking the wiring until you find the problem.

Turn signal, or trunk ?
Do you have power going to the switch ?

http://www.oregonscientific.com/us/en/Weather/Weather-Station-Parts

I don't know what your working on but if you don't have power to the heat switch it is a fuse,you should have one inside and one under the hood.I don't know what kind or the year of car..

CHECK FUSES FIRST THEN CHECK FOR POWER AT THE DRIVERS DOOR MASTER SWITCH.IF IT HAS POWER GOING INTO SWITCH THEN BE SURE THE LOCKOUT SWITCH IF OPERATING.IF IT IS THAN THE MASTER POWER WINDOW SWITCH IS BAD

Replace your power window switch. ( The whole unit where all of your switches are for all four windows)

The48 volt supply is a simple rectifier/filter from the power transformer. The schematics don't even show the switch anyplace that one can find it. It appears they don't even regulate the 48 volts... Some Peavey switches are just in a hole that you have to poke something into with an alternate action button. They use these on some equipment for instance for selecting a powered mixer into L/R or Main/monitor setup. Push in with a match stick... From the manual it lloks like this is supposed to be a tiny square button... these are EASILY broken off but usually you can still actuate the switch with a little stick.

have you checked the fuses for the brake lights it is in the fuse panel under the dash on the driver`s side.if it is good and only the brake lights don`t work(signals work)then the nest step is to check the brake switch.this is under the dash at the base of the brake pedal and above.when you push on the brake pedal it pushes against or moves the switch enough to close the circuit.you should see a 2 wire plug connected to the switch.there should be power on one side of the switch at all times and when you push on the pedal there should be power on both wires.one wire supplies power to the switch and the other supplies power to the brake lights.if you don`t have power on both wires then you have a bad switch.NOTE fords have a problem with the wires breaking at the switch.

Remove the headlamp switch. Check power at the brown wire. If you have power then the problem is after the switch. If you don't have power with the headlamps on then recheck the fuses.

the lights should come on whether or not the doors are open,they are powered by the headlight switch at the same time the switch powers the lights