Mirrors with signals

Hello world, new guy here with a question. I have a 2015 Tacoma TRD Off Road 2wd Prerunner and have noticed the TRD Sports come with signals on the outside mirrors. I'm told they bolt up ok but no one seems to know if they will work when plugged into my truck. I'm told to take off one mirror and look at the plug but that's not a guarantee. I'd really like to add this option to my truck without fooling with the wiring. Plugging in is ok. Anyone ever tried this? Thanks

 

My 14 4wd off road DC has the wiring in the doors but missing from there into dash.

 

Thanks

 

Do you know how involved it is to add the harness?

 

I dont imagine it would be too bad since it would be simple wiring for the signal. Hardest part is running your wires.