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Fig 1: Identifying Audio Unit Connector Inputs And Outputs (Without Navigation)
G05489179Courtesy of AMERICAN HONDA MOTOR CO., INC.

Audio Unit Connector A (20P) 

AUDIO UNIT CONNECTOR A (20P)

Cavity Wire Connects to Cavity Wire Connects to
A1 YEL/GRN Audio switch (Amp.) A10 WHT/BLU(2) Constant power
YEL(5)
A2 YEL/RED(2) ACC (main stereo power supply) A11 BRN Audio remote switch ground
YEL(5)
A3 GRN/RED(1) Audio remote switch A15 PUR(1) Stereo amplifier (Right rear speaker (-))
ORN(3) LT BLU(4)
YEL(5)
A4 RED/WHT(1) (Security input) A16 PNK Stereo amplifier (Left rear speaker (-))
GRN(4)
A5 LT GRN(1) Stereo amplifier (Right rear speaker (+)) A17 RED Stereo amplifier (Front passenger's door speaker (-), Right tweeter (-))
PUR(4)
A6 BLU Stereo amplifier (Left rear speaker (+)) A18 YEL(1) Stereo amplifier (Driver's door speaker(-), Left tweeter (-))
BRN(4)
A7 BUT(1) Stereo amplifier (Front passenger's door speaker (+), Right tweeter (+)) A19 RED Dash lights brightness controller
GRN(4)
A8 RED/BLU(1) Stereo amplifier (Driver's door speaker (+), Left tweeter (+)) A20 BLK Ground (G504)
YEL(4)
A9 RED/BLK Lights-on signal - -- --
(1) '04 model
(2) '04-05 models
(3) '05 model
(4) '05-08 models
(5) '06-08 models

Audio Unit Connector B (14P) ('05-08 USA models) 

AUDIO UNIT CONNECTOR B (14P) ('05-08 USA MODELS)

Cavity Wire Connects to Cavity Wire Connects to
B1 WHT(2) XM receiver (GA +B) B8 RED/BLK(1) Lights-on signal
B2 LT BLU XM receiver (SYS ACC) B9 GRN XM receiver (BUS +)
B3 BLK(1) XM receiver (BUS GND) B10 RED XM receiver (BUS -)
GRY(2)
B4 BRN(1) XM receiver (SAT shield) B11 BLK XM receiver (MAIN GND)
GRY(2)
B5 GRN XM receiver (SAT R+) B12 RED(1) Dash lights brightness controller
B6 BLK XM receiver (SAT L+) B13 RED XM receiver (SAT R-)
B7 WHT/GRN(1) XM receiver (+B) B14 WHT XM receiver (SAT L-)
(1) '05 model
(2) '06-08 models

Audio Unit Connector C 14P) ('06-08 models) 

AUDIO UNIT CONNECTOR C 14P) ('06-08 MODELS)

Cavity Wire Connects to
C1 RED Auxiliary jack assembly-AUX DET
C2 GRN Auxiliary jack assembly-AUX GND
C3 WHT Auxiliary jack assembly-AUX R
C4 RED Auxiliary jack assembly-AUX SGND
C5 BLK Auxiliary jack assembly-AUX L
C6 GRY Auxiliary jack assembly-AUX SH GND

Audio Unit Connector D (5P) ('06-08 models) 

AUDIO UNIT CONNECTOR D (5P) ('06-08 MODELS)

Cavity Wire Connects to
D2 BLU HandsFreeLink control unit (HFL mute)
D3 YEL HandsFreeLink control unit (TELM SIG-)
D4 BRN HandsFreeLink control unit (TELM SIG+)
D5 GRY TELM SIG SH

Audio-HVAC Display Panel Connector C (10P) 

AUDIO-HVAC DISPLAY PANEL CONNECTOR C (10P)

Cavity Wire Connects to Cavity Wire Connects to
C1 BLK Clock ground (5 V) C7 BLU Clock CE signal line
C2 BLU/ORN(1) Clock 5 V signal line C8 GRY Clock shielding ground
BLU(2)
C4 YEL/RED(1) Clock reset signal line C9 RED Clock LCD (BL-) signal line
YEL(2)
C5 YEL(1) Clock signal line CIO GRN Clock LCD (BL+) signal line
PUR(2)
C6 BLU/RED(1) Clock data signal line - -- --
ORN(2)
(1) '04 model
(2) '05-08 models
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