is this happening when car is at idle? the indicators use power so sometimes at idle the amp meter will fluctuate because of this. if this is happening when driving i would have alternator and battery checked
there are 2 small tabs on the turn signal swith in side the steering colum. these turn the signal off when wheel is straightened after turning. if one or both are broken, signal will not turn off automatically
The on screen signal strength meter will help find the direction your antenna should point. Turn the antenna until you see the highest meter reading.
The turn signal switch has a cancel tab molded on it, when this tab is broken off the switch stops canceling the signal. To repair it it will require the turn signal switch be replaced.
most likely a bad turn signal flasher
It has been my experience that a rapid turn signal indicates there is a burnt-out signal light bulb (either front or rear) on the side of the rapid blinking signal. If the right signal is blinking rapidly, the problem is in the signal lights for the right side (front or rear) of the vehicle. Turn the rapid signal on and step out of the vehicle to find which bulb is not lighting.
Turn signal flasher
the flasher that causes the turn signals to flash But where is the flasher located on this car?
1989 silverado left turn signal set applying brakes causes the left turn signal to dim and the two right rear tail light bulbs to alternate brightly? Further problem occurs to same truck - in Park and brakes not applied -- if head lights are on turn signal flash slows right down almost to a stop and becomes very dim
Check/replace turn signal flasher
One of the bulbs is burnt out and not working.
Incorrect size bulb installed.
Check to see if the brake lamp and turn signal lamp are the same bulb. If so, its a bad bulb. See sources and related links below to lookup bulb information.