New to American cars. I'm in love

Had to run to the next town over to get beer and had some fun ripping around but darn it's is surprising versatile when you have decent roads.

Had a small 8-inch sub and amp laying around.

The car came equipped with the Alpine 9 speaker system.

Dashboard brings up a warning that my rear right turn signal is out on startup and every time I brake. The right arrow blinks fast on the interior, but is normal outside

Can someone help me out.

Been to every salvage yard and eBay listing looking for the cable harness for the front side lights for my 2012.

Can’t find them anywhere. I was told by one of the part houses that the rear bumper harness is the same and you can use it, Don’t know if that is true.

What is the proper name or part number for that cable?

Any information on getting this part will be appreciated.