This may very well be a problem with your ground connections at that turn signal.
most likely the rear brake light bulb has a broken wire which is shorting the circuit. change the bulb and it's fixed.
its a ground wire
Driving with you left foot on the brake.
Bulb is burned out.
It sounds like you have a turn signal bulb out probably the left rear.
The trun signal lever needs to be replaced.
That's usually an indication of a burned out bulb.
you need to replace the bliker can in the fuse box.
Maybe a short somewhere...did you replace the flasher unit? No - it was blinking spuradically(?) - now I have to blink it manually and it won't blink at all with lights on.
Normally this is caused by a weak ground at the left turn signal bulb.
flasher will not flash when circuit is open or shorted replace left front turn signal bulb
There are many problems that come with owning a car. If a Left rear brake and turn signal do not work, a person should check the fuses, bulbs and wiring.