Specification Sheet

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PAC-audio.com
Pacific Accessory Corporation
Page 3
Rev: 2
Date:020922
Advanced Amplier Interface
for Select Ford Vehicles
AP4-FD31
Speaker Connections
If using the factory speaker wires to connect to the aftermarket amplier, they will be located in two locations, at the 20-pin
plug at the Digital Sound Processing Module (Amplier) and either a 32-pin or 24-pin plug at the Audio Control Module (Radio).
Adapter plugs are provided for all speaker wire connections.
Because the factory speaker wire pin locations, colors and plug style vary from model to model, reference the charts below
and use a tone generator for speaker locations and polarity. Please note that most vehicles will not follow the "standard"
speaker wire colors and polarity. For example the right front positive speaker lead may connect to the left rear negative
(GRN/BLK) lead on the adapter plug.
APH-FD22
24-PIN RADIO
SPEAKER HARNESS
APH-FD03
32-PIN RADIO
SPEAKER HARNESS
APHFD31HAR
20-PIN AMPLIFIER
SPEAKER HARNESS
TO RADIO
TO RADIO
TO VEHICLE
HARNESS
SPEAKER
LEADS
SPEAKER
LEADS
SPEAKER
LEADS
TO VEHICLE
HARNESS
TO VEHICLE
AMPLIFIER
HARNESS
OR
For additional vehicle applications and the latest speaker wiring
information, visit the AP4-FD31 product page on PACaudio.com
20 Pin Plug at AMPLIFIER (DSP) (AP4FD31HAR)
LEADS PAC COLOR POSITION/POLARITY
Speaker 1
WHT
LF KICK / +
Speaker 1 WHT/BLK
LF KICK / –
Speaker 2 GRY
RF KICK / +
Speaker 2 GRY/BLK
RF KICK / –
Speaker 3 GRN
LF DASH / +
Speaker 3 GRN/BLK
LF DASH / –
Speaker 4 VIO
RF DASH / +
Speaker 4 VIO/BLK
RF DASH / –
Speaker 5 RED
SUB2 / +
Speaker 5 RED/BLK
SUB2 / –
Speaker 6 BLU
SUB1 / +
Speaker 6 BLU/BLK
SUB1 / –
Speaker 7 BRN
Speaker 7 BRN/BLK
32 Pin Plug at RADIO (ACM) (APH-FD03)
LEADS PAC COLOR POSITION/POLARITY
Speaker 1 WHT
LR POD / +
Speaker 1 WHT/BLK
LR POD / –
Speaker 2 GRY
CENTER / +
Speaker 2 GRY/BLK
CENTER / –
Speaker 3 GRN
Speaker 3 GRN/BLK
Speaker 4 VIO
RR POD / +
Speaker 4 VIO/BLK
RR POD / –
Speaker 5 ORG
Speaker 5 ORG/BLK
NOTES:
Ford Bronco (10 Speaker) 2021 | Amplier Location: RH cargo area behind trim panel