Defective flasher relay.
Blinkers, Reverses lights and Hazards are all wired into the same fuse. When a short occurs in one of the components all of the lights will cease to function. The fuse should be checked to see if they are in working condition.
I have a chev cavlier 1995 and the running lights do no work---on the dash the green light keeps blinking----what should I do?
On the 1979 B200 Sportsman V8 if the brake pedal makes all signal lights come on and hazards and flashers do not work on their own, it could be the flasher, but the culprit could also be a burned out bulb or a short in the wiring.
The blinker is on a separate fuse from the hazard lights. You probably need a fuse just for your directionals. It is located right next to the fuse for the hazards.
that points to a broken wire to the light, a bd ground wire or a bad light switch
Defective or unconnected back-up switch.
Blown fuse or bad flasher unit. Often, cars use different flasher for the turn signals and the flasher, so it is possible for the hazards to work and not the turn signals.
The flasher relay is in the hazard switch. The hazards work on my wife's S4 but the directionals don't. I found another posting that says that the relay is in the hazard switch. The fuse is fine.
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.
One fuse controls the function of the hazard, reverse, and turn signals of the car. When there fuse blows all the components stop working.
98 sierra1500 4x4 all lights work excepttail lights fuses are good bulbs are new