Turn indicator

[flt.eng]

I keep getting a dash warning saying the side mirror turn indicator not working. But it is working. It then clears itself after some use, but then comes back next time I use the car. Any ideas.

 

[allegoricus]

I keep getting a dash warning saying the side mirror turn indicator not working. But it is working. It then clears itself after some use, but then comes back next time I use the car. Any ideas.

Conversely, my driver's side mirror indicator isn't working but I get no dash warning.