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 © 2017 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.

PAC-audio.com

Pacific Accessory Corporation

Page 3

Rev. 053017

Advanced Amplifier Interface 

for Ford 

AP4-FD21

Testing and Verification (cont.)

Setting the chime volume using the programming button

1.  Start with the level control knob turned all the way down (counter-clockwise).

2. 

Press the programming button on the side of the interface.

3.  LED 1 will turn green and the chimes will begin continuously beeping.

4.  Turn the level control knob clockwise until the desired chime level is reached.

5. 

You can now either press the programming button twice or wait ten seconds to exit the settings.

Setting the chime volume using the factory SWC (This method not available in Focus)

1.  Start with the level control knob turned all the way down.

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 the chimes will begin continuously beeping.

4.  Turn the level control knob clockwise until the desired chime level is reached.

You can now either press the programming button twice or wait ten seconds to exit the settings. 

Manually Setting the Minimum Volume 

If the minimum volume of the radio (factory radio volume level 1) is too loud, you can manually set the level of the minimum 

volume using either the programming button on the side of the interface or the factory SWC. If you would like to set the 

minimum volume using the AmpPRO app, please proceed to the AmpPRO App section on page 4.

PLEASE NOTE: Level control knob must be connected to module for either of the following methods.
Setting the minimum volume using the programming button

1.  Start with the level control knob turned all the way down (counter-clockwise).

2.  Set the amp gains to the desired level.

3.  Set the volume on the factory radio to 1.

4. 

Press the programming button on the side of the interface twice.

5. 

LED 1 will turn amber and the chimes will begin beeping every five seconds.

6.  Turn the level control knob clockwise until the desired minimum volume level is reached.

7. 

You can now either press the programming button once or wait ten seconds to exit the settings.

Setting the minimum volume using the factory SWC (This method not available in Focus)

1.  Start with the level control knob turned all the way down (counter-clockwise).

2.  Set the amp gains to the desired level.

3.  Set the volume on the factory radio to 1.

4. 

Press and hold the track up 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.

5. 

LED 1 will turn amber and the chimes will begin beeping every five seconds.

6.  Turn the level control knob clockwise until the desired minimum volume level is reached.

7. 

You can now either press the programming button once or wait ten seconds to exit the settings.

Use of the AmpPRO App allows 

you to do the following:

• 

Configure User Interface Options such 

as:

•  Minimum Volume Level

•  Chime Volume Level

• 

Enable / Disable AP4 Chimes

•  Enable / Disable factory EQ

•  Bass / Mid / Treble boost frequencies 

and Q factor

• 

Update Product Firmware

• 

Read Firmware / Hardware Versions

• 

You can download the Amp PRO app at : 

http://aampglobal.com/appdownloads

AmpPRO App

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