Brake lights stop working....

[nicothehut]

So both brake light left and right have stopped working.
but
The 3'rd brake light still works.
The Running lights witch are the same bulb as both left and right brake lights still work.
New lights in both.
Only fuse i could find was a 20a in divers door panel also replaced.

Not sure on my next move from here.

Thanks for any help

Nico.

[03Alerosil]

Brake switch probably. The main brake lights and the 3rd brake light run on separate circuits from it. Easiest thing to do would be a voltage drop test. Check for power coming out of the switch and power at the light bulb sockets themselves. Try to find where the voltage hits 0 and that's your problem