Infiniti QX56 I (2004-2007) gnd amp on wiring diagram

1 2 3 4 17 18 19 20 +BAT CENTER (-) WOOFER OUT (-) 21 22 23 24 SAT LCH (-) SAT LCH (+) SAT RCH (-) SAT RCH (+) 26 27 28 DATA EARTH 29 30 31 32 33 34 35 36 TXD RXD 41 42 43 44 L (-) L (+) R (-) R (+) 46 47 48 DATA EARTH 49 50 51 52 RX TX 6 1 2 3 5 4 B+ IN (-) IN (+) AUDIO UNIT BACKUP BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BOSE SPEAKER AMPLIFIER (BEHIND CENTER OF DASH) BRN WIRE CENTER SPEAKER EARTH (SIG) GND AMP ON GRN WIRE GRN/WHT WIRE LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER LEFT REAR DOOR SPEAKER LEFT REAR DOOR TWEETER LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE ORG/BLU WIRE PPL PWR GND CENTER (+) WOOFER OUT (+) PPL RED WIRE RED/BLU WIRE REQ+ RIGHT FRONT DOOR SPEAKER RIGHT FRONT TWEETER RIGHT REAR DOOR SPEAKER RIGHT REAR DOOR TWEETER SATELLITE RADIO TUNER (PRE-WIRING) SUBWOOFER WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE YEL WIRE