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Check the signal light fuse, the signal light relay, and the signal light switcher.
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
A broken wire or short in the wiring.
If neither signal light works, the flasher may very likely be the problem. The hazard lights and the signal lights work off different flashers.
Believe it or not, I have had to disconnect the cig lighter in order for the tail lights to work. Sounds far fetched but it does work!
The most common problem is a bad fuse.
Could be the control stick for the blinkers. If the lights work, try replacing the stick or checking out the signal path for that blinker
Most common problem --turn signal flasher needs replacement Could also be a problem in steering column
That sounds like a grounding problem, probably near the right side lights. It might be a rusty or disconnected ground wire.
did you check your fuses
Check the brake light switch first. It is usually near the brake pedal under the dash. A bad turn signal switch can also cause this if the brake lights are also turn signal lights. If the brake lights are independent of the turn signals then disregard the switch problem. A good wiring diagram will help to diagnose the problem also. Check with dealership mechanics as they have access to diagrams.
Depending on what type of vehicle it is, it could be the combination flasher relay. 2000 Dodge Caravan, same problem. Replaced DRL/Flasher Relay, problem fixed. Was an expensive dealer only relay...