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Pacific Accessory Corporation
Page 2
Rev. V12
Date:092019
Advanced Amplifier Interface for
Chrysler / Dodge / Jeep / RAM
AP4-CH41 (R.2)
Installation
1. Remove factory radio.
2.
Disconnect the main 52-pin factory harness from radio.
3. Connect AmpPRO harness to vehicle harness.
4. Connect AmpPRO harness to factory radio.
5.
If you are using the AmpPRO in a vehicle with no factory amplifier, connect the aftermarket amplifier's speaker outputs to the
provided harness. If the vehicle has a factory amplifer, disconnect the harness with the loose speaker leads and connect it
to the matching plug on the AP4 harness.
6.
Set any feature DIP switches that apply to your install.
a.
Set DIP switch 1 on (down) to activate two channel mode. In this mode, both the TOSLINK and front RCA outputs (1 and
2) become non-fading outputs. All rear chimes will also be routed through these outputs in two channel mode.
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 5 for more details.
c.
DIP switch 3 is not used.
d.
DIP switch 4 is for vehicles without a factory amplifier. Set DIP switch 4 on (down) to reconfigure the radio for proper
communication with the AmpPRO.
If you set this DIP switch on, once you connect the AmpPRO to the vehicle you
must do two full sleep cycles to reconfigure the radio. To do a sleep cycle, make sure the vehicle ignition is off,
close all doors, trunk and/or tailgate, lock the vehicle with the keyfob and let it sit for at least five minutes. To
wake the vehicle back up, unlock the doors, turn on the ignition, and wait for the radio to come on.
After two sleep
cycles the radio will be configured for a factory amplifier and ready for use with the AP4. This can be verified by turning the
vehicle on, powering up the radio, and rolling the volume knob. If the radio is configured properly, LED 1 will flash rapidly
when the volume knob is turned.
7. If you are using the APA-TOS1 (sold separately) refer to the instructions included with that product for its installation.
8.
Connect the AmpPRO harness to the module.
9.
Connect the level control knob to the module and install in an accessible location.
10.
Connect the signal cables and remote input from the aftermarket amplifier.
DIP
1 2 3 4
ON
Two Channel Mode
5v / 4v Preout
No Function
Non-Amplified Vehicles
1
2
3
4
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.
Wiring Connection Chart
To Aftermarket
Amplifier
Non-Fading
Rear
Front
1(L) 2(R)
4(R) 5(L) 6(R)
3(L)
Remote Turn On Output
2A Max Output
Factory Speaker
Connection Point
Factory Speaker
Connection Harness
To Radio
To Vehicle
Harness
Non-Fading
Level Control
Knob
