That sounds like a grounding problem, probably near the right side lights. It might be a rusty or disconnected ground wire.
Signal to driver’s behind
Try replacing the turn signal flasher
Type your answer here... It could be the back up light censor. Depending on where it's located, you may have to drop the tranny. that could be where the censor is located. I had the same problem in my 1998 grand Cherokee and that's where it was located. the censor is about $20.
The horn, The signal lights, The brake lights, The back up lights, Flashing the high beam headlights,
Use your signal lights.
Use your signal lights.
You should clarify your problem or question. Is it the front or rear signal light? Is the tail light coming on with the signal light? Are none of the lights coming on at all?
On the left turn signal lever, twist the end cap to turn lights from OFF - Parking - ON - AUTO
check and make sure all the lights are on like if a turn signal is out in the front then the signal will stay on in the back when you turn the turn signal on.
Its located behind the front bumber on the drivers side. Under the turn signal lamp.
Stop signs
Try checking & replacing turn signal flasher, which is usually located underdash by your left knee if your sitting in the drivers seat. Good Luck...