Power factory amp using aftermarket headunit (Infinity)

cartisdm · **Joined:** Fri Aug 09, 2013 7:52 am **Posts:** 23

I have a 2008 Liberty with the upgraded Infinity sound system. My Pioneer appradio is all installed and functioning except for sound. I am 99% this is because I can't get power to the factory amp. I checked all my fuses and nothing is blown. The headunit will power on/off with the ignition as expected. There were two plugs coming from the back of my factory radio and I only messed with one because I assume the other is for steering wheel controls (I haven't ordered that adapter yet).

The headunit has a blue/white wire for the power antenna which I wired to #7 in the diagram below. Am I missing something? I don't have any desire to swap out to an aftermarket amp, I'm fine with the Infinity system. I just can't get it to turn on!

I'll be working on this all day so if you need pictures or clarification on anything, just ask.

Code:

1    18RD       FUSED B(+) (I.O.D.)         <---fed to "always on" wire on headunit as directed by Pioneer
2    20WT       CAN INTERIOR BUS (-)             <---not connected
3    -
4    -
5    -
6    -
7    18GY/OR    AMPLIFIED ANTENNA FEED       <---fed to blue/white powered antenna on headunit
8    18GY/LG    LEFT REAR SPEAKER (+)           <--goes to corresponding speaker wire on headunit
9    18GY/DG    LEFT REAR SPEAKER (-)           <--goes to corresponding speaker wire on headunit
10   18DG/LG    RIGHT REAR SPEAKER (+)         <--goes to corresponding speaker wire on headunit
11   18DG/GY    RIGHT REAR SPEAKER (-)         <--goes to corresponding speaker wire on headunit
12   18BK/WT    GROUND                               <--goes to ground wire on headunit
13   20WT/OR    CAN INTERIOR BUS (+)           <---not connected
14   -
15   -
16   -
17   -
18   -
19   18DG/VT    RIGHT FRONT SPEAKERS(+)         <--goes to corresponding speaker wire on headunit
20   18DG/YL    RIGHT FRONT SPEAKERS(-)         <--goes to corresponding speaker wire on headunit
21   18GY/VT    LEFT FRONT SPEAKERS(+)         <--goes to corresponding speaker wire on headunit
22   18GY/YL    LEFT FRONT SPEAKERS(-)         <--goes to corresponding speaker wire on headunit

Note: I wired the "power on ignition" wire coming from the pioneer headunit into my cigarette wire. Maybe I need to do something similar with the amp?

cartisdm · **Joined:** Fri Aug 09, 2013 7:52 am **Posts:** 23

I clipped the wires from this harness below...

...and wired them according to the schematic in my original post as seen below

This is the harness I did not touch. Originally I was thinking it was for just steering wheel controls but after closer inspection it does say AMP on it. Do I need to splice these into the back of my headunit too? There's no wires left so I assume some will be 2-to-1?

papaindigo · **Posted:** Fri Mar 07, 2014 5:16 pm

What specific model Pioneer and did you get if from Crutchfield? If you did get it from Crutchfield just call them. I had exactly the same problem wiring in my Sony MEX-BT3900U some years back. The problem was I had failed to conect the wire to power on the amplifier which is powered separately from the speakers in the Infinity Premium sound system. In my case the Crutchfield wiring diagram showed a blue wire but it's actually Blue/white

Power factory amp using aftermarket headunit (Infinity)

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