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Could be the bulbs or the fuses or the flashers or the signal switch assembly
Bad wiring i am guessing that something is wrong with your turn signal switch. Actually, The turn signals and hazard lights are controlled by 2 different relays. Try changing the Turn-signal relay.
For most vehicles the hazards and signals are two separate circuits, they have separate fuses and separate flashers. Check your signal light fuse and signal light flasher.
Two separate circuits in most vehicles. You have a fuse and a flasher for the hazards and you have a separate fuse and flasher for the signals.
Probably the Electronic Flasher. These ,when the fail,will allow the Signals and/or hazard lights to work intermittently. The flasher is the same for both the signals and hazards.
Your problem is most likely the turn signal relay im having a problem similar to yours but when my signals wont work neither do my hazards
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 problem that I had with my 2001 Ranger rebuild was I had tail-lights and back up lights along with brake lights. No turn signals or hazard lights. More than likely, it is a bad turn signal control arm. There is also a relay box under the dash. My problem was that the relay had gotten wet and had rusted inside. As soon as we replaced this, I had turn signals and hazards. Hope this gives you a reference where to start your search. Good Luck, Dan
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.
Not as front signals.
Probably the flasher unit needs to be replaced. This is an electronic switch which usually mounts underneath the dashboard.
Turn signals and hazards are two separate curuits. Check/replace your signal light fuse and flasher.