On my truck they use the following designations for the connectors:
C50 for the left heated powered mirror and C51 for the right powered mirror.
C50 PINOUT:
A: Circuit 580 Color BR Desc: Fused battery input to the heated mirror
B:
C: Circuit 59 Color BK Desc: Ground G4
D: Circuit 948 Color DG/YL Desc: Left mirror vertical control
E: Circuit 942 Color OR/BK Desc: Left mirror common
F: Circuit 947 Color DB/YL Desc: Left mirror horizontal control
C51 PINOUT:
A: Circuit 580 Color BR Desc: Fused battery input to the heated mirror
B:
C: Circuit 59 Color BK Desc: Ground G4
D: Circuit 953 Color DG Desc: Right mirror vertical control
E: Circuit 944 Color OR Desc: Right mirror common
F: Circuit 952 Color DB Desc: Right mirror horizontal control
C52 PINOUT:
A: Circuit 580 Color BR Desc: Fused battery input to the heated mirror
B: Circuit 59 Color BK Desc: Ground G4
There are two mated-pairs of C52 connectors in each door.