You need to complete the circuit and make sure that there's a clean connection from the socket to the metal chassis of the vehicle.
Current needs to flow from the battery + terminal, through the fuse, through the wire to the socket, through the bulb, then to the metal chassis of the vehicle, which will be connected to the - terminal of the battery. If there is any break anywhere in the circuit then the bulb won't light up.
Ok, there's voltage. But did you check for ground? And what's the year, make, model...because every vehicle is wired differently.
there is a switch behind the brake pedal on most cars, i would check to make sure it is getting contact when brake is pushed, also i would make sure switch is properly mounted... sometimes you can just turn the switch a few times to bring it closer to the pedal... also check and make sure the wires going to switch are not damaged and intact and hooked up... your best bet would probably be to go to the auto parts store, get a new switch, and replace.. they are usually from$10-$30.. and a very easy do it yourself job on most cars..
this is the most common problem when you have complete brake light failure... if its just one light not working, its be a bad light socket more than likely.
good luck and hope this helped..
also... did you check the socket with the light turned on?? if so, you will have current going to socket... make sure headlights are turned off and have someone push break pedal repeatedly while testing to see if
test light flashed with each push of pedal..
Sounds like a broken ground lead!
I checked the fuse & the fuse isn't blown. And I check the bulb with a test light & there's voltage going to the break light socket.
