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 © 2021 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.

PAC-audio.com

Pacific Accessory Corporation

Page 6

Rev: 2

Date:020922

Advanced Amplifier Interface 

for Select Ford Vehicles

AP4-FD31

20 Pin Plug at AMPLIFIER (DSP) (AP4FD31HAR)

LEADS

PAC COLOR

POSITION/POLARITY

Speaker 1

WHT

LF DOOR / 

+

Speaker 1

WHT/BLK

LF DOOR / 

Speaker 2

GRY

RF DOOR / 

+

Speaker 2

GRY/BLK

RF DOOR / 

Speaker 3

GRN

LR DOOR / 

+

Speaker 3

GRN/BLK

LR DOOR / 

Speaker 4

VIO

RR DOOR / 

+

Speaker 4

VIO/BLK

RR DOOR / 

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

Speaker 8

WHT/BLU

Speaker 8

WHT/RED

Speaker 9

LT GRN

Speaker 9

LT GRN/BLK

32 Pin Plug at RADIO (ACM) (APH-FD03)

LEADS

PAC COLOR

POSITION/POLARITY

Speaker 1

WHT

CENTER / 

+

Speaker 1

WHT/BLK

CENTER / 

Speaker 2

GRY

LH DASH / 

+

Speaker 2

GRY/BLK

LH DASH / 

Speaker 3

GRN

LH DASH / 

+

Speaker 3

GRN/BLK

RH DASH / 

 

Speaker 4

VIO

 

Speaker 4

VIO/BLK

Speaker 5

ORG

Speaker 5

ORG/BLK

NOTES: Dip switch #4 must be ON

Ford Mach-E  2021 | 

Amplifier Location: RH cargo area behind trim panel

20 Pin Plug at AMPLIFIER (DSP) (AP4FD31HAR)

LEADS

PAC COLOR

POSITION/POLARITY

Speaker 1

WHT

LF DOOR / 

+

Speaker 1

WHT/BLK

LF DOOR / 

Speaker 2

GRY

RF DOOR / 

+

Speaker 2

GRY/BLK

RF DOOR / 

Speaker 3

GRN

LR DOOR / 

+

Speaker 3

GRN/BLK

LR DOOR / 

Speaker 4

VIO

RR DOOR / 

+

Speaker 4

VIO/BLK

RR DOOR / 

Speaker 5

RED

SUB2 / 

+

Speaker 5

RED/BLK

SUB2 / 

Speaker 6

BLU

SUB1 / 

+

Speaker 6

BLU/BLK

SUB1 / 

Speaker 7

BRN

CENTER / 

+

Speaker 7

BRN/BLK

CENTER / 

Speaker 8

WHT/BLU

Speaker 8

WHT/RED

Speaker 9

LT GRN

Speaker 9

LT GRN/BLK

32 Pin Plug at RADIO (ACM) (APH-FD03)

LEADS

PAC COLOR

POSITION/POLARITY

Speaker 1

WHT

Speaker 1

WHT/BLK

Speaker 2

GRY

LF TWEET / 

+

Speaker 2

GRY/BLK

LF TWEET / 

Speaker 3

GRN

RF TWEET / 

+

Speaker 3

GRN/BLK

RF TWEET / 

 

Speaker 4

VIO

Speaker 4

VIO/BLK

Speaker 5

ORG

Speaker 5

ORG/BLK

NOTES:

Ford F-250/350/450 (10 Speaker)  2020 & Up | 

Amplifier Location: Behind LH rear seat back

Summary of Contents for PAC AmpPRO AP4-FD31

Page 1: ...he factory speakers that were connected to the factory amplifier will no longer function 4 On most Ford models some of the vehicle speakers will be connected to the radio module in addition to the external amplifier These speakers will also stop working when the factory amplifier is disconnected and will need to be powered by an aftermarket amplifier See Speaker Connections on Page 3 for vehicle s...

Page 2: ...t voltage to 4v Leave DIP switch 2 off up to keep the RCA output voltage at 5v See troubleshooting section on Page 11 for more details c DIP switch 3 is not used and should remain off up d Set DIP switch 4 to on down position if installing interface in a Mach E For all other vehicle models DIP switch 4 should be off up 5 Connect the AmpPRO harness to the AmpPRO Interface Connector 1 6 Connect the ...

Page 3: ...pter 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...

Page 4: ...WHT CENTER Speaker 1 WHT BLK CENTER Speaker 2 GRY LH DASH Speaker 2 GRY BLK LH DASH Speaker 3 GRN RH DASH Speaker 3 GRN BLK RH DASH Speaker 4 VIO Speaker 4 VIO BLK Speaker 5 ORG Speaker 5 ORG BLK NOTES 20 Pin Plug at AMPLIFIER DSP AP4FD31HAR LEADS PAC COLOR POSITION POLARITY Speaker 1 WHT LF DOOR Speaker 1 WHT BLK LF DOOR Speaker 2 GRY RF DOOR Speaker 2 GRY BLK RF DOOR Speaker 3 GRN LR DOOR Speake...

Page 5: ... ORG Speaker 5 ORG BLK NOTES Ford F 150 8 Speaker 2021 2022 Amplifier Location Behind LH rear seat back 20 Pin Plug at AMPLIFIER DSP AP4FD31HAR LEADS PAC COLOR POSITION POLARITY Speaker 1 WHT LF DOOR Speaker 1 WHT BLK LF DOOR Speaker 2 GRY LH DASH Speaker 2 GRY BLK LH DASH Speaker 3 GRN LF OVERHEAD Speaker 3 GRN BLK LF OVERHEAD Speaker 4 VIO LH HEADREST Speaker 4 VIO BLK LH HEADREST Speaker 5 RED ...

Page 6: ...aker 3 GRN LH DASH Speaker 3 GRN BLK RH DASH Speaker 4 VIO Speaker 4 VIO BLK Speaker 5 ORG Speaker 5 ORG BLK NOTES Dip switch 4 must be ON Ford Mach E 2021 Amplifier Location RH cargo area behind trim panel 20 Pin Plug at AMPLIFIER DSP AP4FD31HAR LEADS PAC COLOR POSITION POLARITY Speaker 1 WHT LF DOOR Speaker 1 WHT BLK LF DOOR Speaker 2 GRY RF DOOR Speaker 2 GRY BLK RF DOOR Speaker 3 GRN LR DOOR S...

Page 7: ... using the factory SWC 1 Start with the level control knob turned all the way down the vehicle running and the driver s door closed 2 Press and hold the track down button on the factory SWC for approximately ten seconds PLEASE NOTE The radio will respond to the SWC commands during this process this is normal and has no effect on the AP4 operation 3 LED 1 will turn green and there will be three bee...

Page 8: ...o make the adjustments with the module installed and the factory radio on so that the changes can be heard Minimum Volume Level This allows you to set the minimum volume level of the factory radio factory radio volume level 1 Chime Volume Level This allows you to set the volume of the AP4 chimes ie park sensors 3 Band EQ Enabled This allows you to enable disable the 3 band factory EQ Bass Mid Treb...

Page 9: ...ing the programming button on the side of the module until the status LEDs start blinking red Once the LEDs start blinking red release the button This reset will restore the following settings to their factory defaults Chime volume level Minimum volume level Enable Disable factory EQ Factory EQ frequency Factory EQ Q factor AmpPRO App cont Troubleshooting 1 No audio Check to see if LED 1 is illumi...

Page 10: ...ed in normal use due to defects in material or workmanship This warranty does not cover installation expenses Attempting to service or modify our products or operate them outside their recommended usage will render this WARRANTY VOID Unless prescribed by law PAC is not liable for any personal injury property damage and or incidental or consequential damages including water damage resulting from pr...

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