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Do your turn signals work?
When you unplug the brake switch do the lights remain on?
Turn your turn signals on and listen for the clicking sound under the left hand side of dash. There should be two square looking relays. Unplug both and see if lights go out
Are you sure its your brake lamps and not your park lamps? Try to put vehicle in gear without pushing the brake.
On the brake switch that you are unplugging is there a green wire with a white tracer and green wire?
ok now i want you to unplug connector 220 from fuse panel and let me know if lights go out
Tug on the plunger of the switch until it comes out a little. This will reset the switch after that reinstall switch by simply turning switch in alignment hole. Then see if your lights work correctly.