Volvo Repair: 90 740 gle, bulb failure, brake switch

Question
i have no brakelites-bulbs,fuses, switch all fine
problem under the dash?

Answer
possible burnt out third brake bulb in rear window and bad bulb failure sensor relay for rear brake lights on taillights.the 3rd brake light does not go through the relay so check it also.this is assuming you checked for power in and out of the brake switch.