Brake Lights

[deputydog]

On occasion the brake lights will not work then start working again…the third brake light always works even when main ones are out.

I checked and cleaned grounds and still occasionally lose the main brake lights.

For trouble shooting…i assume the third brake light and the main brake lights all get power from same 12v source? If that is correct what would cause the main ones to not work yet third one stay on?

Someone told me could be ignition switch but i would assume that would also make the third brake lights not work and it has never failed.

Any help would be appreciated where to start looking

 

[TurboTGuy]

There is a ground for them on the left fender well inside the trunk. It's the only one. Make sure it hasn't corroded or loosend.

EDIT, I didn't see you had checked it....

That's all I got... Good Luck, post up the fix.