Flasher relay is defective.
Turn signal indicators are lights. The flash to tell you, or indicate, that a turn signal is on, and which way the lights are flashing.
Replace the turn signal flasher relay.
Bad ground.
Check the fuses
Wire in a turn signal flasher in series with the circuit you wish to flash. The flasher has two terminals. Just insert the flasher anywhere in the circuit. It will make/break the circuit to make the lights flash. This is considering that the circuit is 12 volts and not 120 volts.
A strobe signal is the name for any signal that flashes on and off. For example the turn-lights on a car. Certain lights such as some leds aren't actually on all the time but flash faster than the eye can see, that is also a strobe signal.
Usually mean you have a burnt out bulb. Simply replace it and you should be fine.
If neither signal light works, the flasher may very likely be the problem. The hazard lights and the signal lights work off different flashers.
was jeep in accident and repaired? sounds like crossed or shorted wires
If they come on and will not flash, replace the Flasher Relay. If they just don't come on replace the blown out bulb.
Burned out bulb Faulty socket and/or wiring/ ground Faulty turn signal flasher Faulty turn signal Switch
You may have a "ground loop" problem on the left turn signal. Check the ground wire at the front and rear signal bulbs.