Could be a bad stop light bulb in rear (both filaments touching) causing a backfeed. Could be a bad ground and system is searching for ground through path of least resistance
Brake light on 1994 Honda civic staying on.
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..
The ground circuit for your Honda Civic brake lights can be found on the rear frame rail. The ground circuit will be on the drivers side frame rail.
The brake light fuse for a 1995 Honda Civic is found in the cabin fuse box. The fuse is labeled as STOP.
The running lights have a bad ground.
There are several warning lights on a 2008 Honda Civic. The main lights are for the brake system, air bag system, check engine, tire pressure, oil pressure, and battery power.
Check bulbs, fuse, bad ground, brake light switch.
You need a minimum of 2 brake lights, So if your car has 3 brake lights and one goes out, you are still legal. Some cars do not come equipped with 3 brake lights but others do such as a honda civic with a spoiler light do.
Check to see if any are blown and replace
Usually at the base of the brake pedal.
check fuses, and then check for power to the bulbs check for power in and out of brake switch
Probably the flasher unit needs to be replaced. This is an electronic switch which usually mounts underneath the dashboard.