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AP4-FD21
Module Layout
Interface Connector 1
Expansion Port
Programming Button
USB Connection
Installation
Set DIP switches to the ON position to activate the corresponding features.
Set DIP switches to the OFF position for any features that are not desired.
No Function
1 2 3 4
DIP
ON
* See troubleshooting section on page 4 for more details
1. Remove factory radio and LCD screen.
2. Disconnect the 52-pin harness from the LCD screen and the 24-pin harness from the radio.
3. Connect AmpPRO harnesses to vehicle harnesses.
4. Connect AmpPRO harnesses to LCD screen and factory radio.
5. Set any feature DIP switches that apply to your install.
a. DIP switch 1 is not used.
b. Set DIP switch 2 on (down) to lower the RCA output voltage to 4v. Leave DIP switch 2 off (up) to keep the RCA output
voltage at 5v. See troubleshooting section on page 4 for more details.
c. DIP switches 3 and 4 are not used.
6. If you are using the APA-TOS1 (sold separately) refer to the instructions included with that product for its installation.
7. Connect the AmpPRO harness to the module.
8. Connect the level control knob to the module and install in an accessible location.
9. Connect the signal cables and remote input from the aftermarket amplifier.
10. Turn vehicle off, remove the key, lock the car using the factory keyfob, and let the car sit for 10 minutes. This will ensure
that the vehicle data-bus goes to sleep and the AmpPRO will function as intended.
Setup and Configuration
1. Turn the ignition on. LED 1 on the interface will turn on and the +12v remote output will turn on.
2. Set the amp gain(s) to the desired level. We recommend using an oscilliscope and test tones to set the amp gain(s). Please
refer to the MECP Advanced study guide (p. 360) if you are unfamiliar with this process.
3. Check volume, balance, fade and EQ settings.
4. If you would like to adjust the chime volume or minimum volume, do so using one of the methods outlined below. If you are
happy with the default levels, no adjustments are necessary.
Manually Setting the Chime Volume
You can manually set the level of the factory chime using either the programming button on the side of the interface or the
factory SWC. If you would like to set the chime volume using the PC app please proceed to the PC App section on page 4.
PLEASE NOTE: Knob must be connected to module for either of the following methods.
Pacific Accessory Corporation
Feature Select
DIP switches
Non-Fading Level Control
Knob Connection
5v / 4v Preout
1
© 2017 AAMP Global. All rights reserved. PAC is a Power Brand of AAMP Global.
TOSLINK Output
(APA-TOS1 sold separately)
Front Output
Ch. 1(L) and 2(R)
Troubleshooting*
2
3
PAC-audio.com
Advanced Amplifier Interface
Rear Output
Ch. 3(L) and 4(R)
Non-Fading Output
Ch. 5(L) and 6(R)
Troubleshooting*
4
Rev. 053017
for Ford
LED 1
LED 2
Page 2
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