No wonder the Right mirror wasn't working. This truck had the rare signal mirrors, but they were both replaced by a previous owner. This one was replaced as an assembly with an aftermarket version that uses a different glass mounting plate.
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Add hidden (OE-style) turn signals to both door mirrors $120 (while mirrors are apart & door panels are off; includes wiring as needed & 2 LED arrow panels)
Add heating elements (& wiring from rear defrost circuit) to mirrors $50ea (while door panels are still off) (requires original-style Right mirror motors & plate)

Supply & install original-style Right power mirror MOTORS & GLASS PLATE ONLY $40 (while door panels are still off; mirror body not included due to bedlining)
R&I right door panel, connect mirror pins to door connector $90 DONE (includes lube door latch & handle)
The Right unlock button doesn't work, probably because of the RKE removal. Remove abandoned wiring & repair damage: $60/hr clock time