Upgrading to Side Mirrors with Turn Signals

#1
If I swap out to side view mirrors with turn signals will I have to change the wiring or is it already wired for it?

on my old car, all options were already wired in and you could just swap parts
 
#2
Theoretically, the wiring should already be there. To be safe, remove the mirror first and verify the connections exist before you buy the mirrors with integrated signals.
 
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