It needs checked out but both the hazard and brake lights go through the turn signal switch.
turn signal switch needs replaced!
blubs blown? Check the turn signal switch.
Bad bulbs? Sockets corroded?
possibly the fuse for brake lights......also could be brake light switch----turn signal switch----broken wiring anywhere in the vehicle---relay not working ---any other item specific to your venicle.
the turn signal switch is probably bad
Check the fuse for the brake lights. It should be marked stop/haz on the fuse box cover.
if you mean: "why do hazard lights flash when brakes are on", then the answer is because vehicles are equipped with a hazard light relay that supercedes the brake lights. This way, slow moving vehicles can operate under hazard lighting.
The only thing common to all those lights (but not to the center brake light) is the hazard switch. I'd check that next. On my 96 Century the hazards override the signals and brake lights meaning that the signals and brake lights must be wired into the hazard switch somehow.
The problem points to the directional/lights and hazard switch. The brake light wiring is part of that circuit.You can buy the switch after market it is about $70.00.
It is important to have working brake lights on a vehicle. If the brake lights are not working a person should first check the fuse, bulbs and at last the wiring.
Your problem very well could be the hazard switch. i have a 1994 honda civic too i found whenever i disconnected the hazard switch from the wiring harness my turn signals brake lights and of course hazards do not work. Maybe replace the hazard switch..
Check the brake switch at the pedal.