Awesome!See attached diagrams
Did you ever get this to function? I am in a similar scenario. 24 RCSB XL. I bought a set of mirrors with lights second hand. I did all the Forscan settings. The passenger side worked, no problem. Driver's side, nothing. The truck is currently out for tint and PPF, when I get it back I will take a look at the wiring diagrams and compare them to my truck.
Well some good news to report. I picked my truck up from the tint and PPF shop today, drove it home and immediately pulled off the interior mirror covers. This is what I found: I am not crazy. The wires for the puddle lamps and turn signals are in fact missing from my door harness on the driver's side. Pins 7 and 14. So now I need to figure that out, but it shouldn't be too bad.
2022Bruce_L, you might want to check yours. If you look at the back of the harness connector that plugs in to the mirror, the corners are numbered that correspond to their position from left to right, so top row 1-11, bottom row 12-22.
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Cool. I'll get some better pics next week. Thank you for taking a look and the info.Your pin 14 (puddle lamp) is populated on the harness, so I am guessing the pin 7 (turn signal) is as well, I can't tell from the picture, so at least your harness looks ok. I can't really see from the pictures which pins are present on the mirror side connector, but my non power fold, turn and puddle mirrors had pins: 1,3,4,5,7,8,13,14,15,20, and 22 present.