Brake light switch

Bonnie 1992 SSEi

I had my 3 brake bulbs checked, it´s Ok. Randomily my dash show burned brake light or something is going wrong with the system. Could it be a bad brake switch?
If yes, how can I acess it?
Is it below of the brake pedal?
Any tip will be welcome.
Malachias (Brazil):runaround:

You most likely have a dirty bulb socket in one of the tail lamps, I think its also possible for a license plate bulb to be bad.. Clean all of the sockets, use some dielectric grease and reinstall the bulbs... The Driver Information system monitors the bulbs, if any of the contacts are dirty this can cause issues with the system..

Thanks a lot Jrs3800 for your tip. I realy forgot to check my license plate bulbs even
knowing that was part of the system. I had check this plates bulbs contact/sockets today and "BINGO"; it was corroded. I clean it up it and put some dielectric greese. How was a randon bug I hope that I had solve the problem. Til now it´s okay.
Regards
Malachias (Brazil)