Installation Guide

Pacific Accessory Corporation

Page 5

Rev. 070617

Advanced Amplier Interface

for Ford

AP4-FD21

Restoring Factory Settings

You can restore the interface to factory default settings by pressing and holding 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

• Enable / Disable Factory Chimes

• Minimum volume level

• Enable / Disable factory EQ

• Factory EQ frequency

• Factory EQ Q factor

Troubleshooting

1. Hiss at high amp gain - Set feature DIP switch 2 to the on (down) position to lower the output voltage of the AP4 to 4v. If you

still hear the hiss, lower your amp gains until the hiss is gone.

2. Cannot hear SYNC or nav voice - Use the volume knob while either of these voice prompts are active to adjust voice volume.

3. Cannot hear chimes - Set chime volume using process outlined in Setup and Conguration, or using the AmpPRO application.

If you still do not hear chimes, be sure that you are using the remote output from the AP4 to turn on your aftermarket amplier.

4. Low volume setting on radio is too loud - Set minimum volume using process outlined in Setup and Conguration, or using

the AmpPRO application.

5. SYNC or Bluetooth voice is cutting off too early - Set feature DIP switch 3 to the on (down) position.

6. After using SYNC or Bluetooth, the volume knob becomes unresponsive - Set feature DIP switch 4 to the on (down) position

Action / Color

During Normal Operation

Solid Red

Module Active

Solid Green

Chime Volume Adjustment Mode

Solid Amber

Minimum Volume Adjustment Mode

Rapid Blink Any Color

DSP Activity

LED2

Blink Amber

USB Connection Detected

Both LEDs

Alternate Blinking Red

Performing eprom reset

LED Legend

LED 1