Welcome,

Other than checking the wiring, I don't know of anything to try but maybe someone else will chime in.

 

thanks, will try some messing around with the deck tonight before removing the dash

 

Check to see if the stereo was installed with a wiring interface.

Like this one:
PAC RP4-CH11 Wiring Interface Connect a new car stereo and retain factory steering wheel audio controls, entertainment system, and amp in select 2004-up Chrysler models at Crutchfield

The OEM amplifier, that is located on the back near the spare tire, controls the balance of the speakers. It needs a signal from the factory stereo to do this. A module, like the PAC CH11 or from idatalink, is needed to retain factory controls with a new stereo.

 

Check to see if the stereo was installed with a wiring interface.

Like this one:
PAC RP4-CH11 Wiring Interface Connect a new car stereo and retain factory steering wheel audio controls, entertainment system, and amp in select 2004-up Chrysler models at Crutchfield

The OEM amplifier, that is located on the back near the spare tire, controls the balance of the speakers. It needs a signal from the factory stereo to do this. A module, like the PAC CH11 or from idatalink, is needed to retain factory controls with a new stereo.

So if the unit was installed with a cheap harness and no interface, the amp wouldn’t get a signal therefore limiting the use of the speakers?
I noticed yesterday also the steering wheel controls don’t work either.

I’m going to try and make a Bluetooth call through the system, apparently one solution is that it gets stuck in Bluetooth call mode (???) and only plays through the front speakers.
The other thing I’ll try is the microprocessor reset behind the faceplate.

ive also noticed there is a bit of tape or something by the steering wheel maybe indicating that a microphone used to be mounted there.
Lady has the car at work today so I’ll check it out tonight

 

That’s correct, it might be missing the module interface or wired incorrectly.

Worst case, the amplifier is the problem. Although, you would get no sound if it was bad. It receives front left and right sound from the stereo and uses that to push sound to all speakers.

 

That’s correct, it might be missing the module interface or wired incorrectly.

Worst case, the amplifier is the problem. Although, you would get no sound if it was bad. It receives front left and right sound from the stereo and uses that to push sound to all speakers.

Alright, opened the dash and the wiring is all sorts of messed up. Buddy’s even done some splicing in the vehicle harness. Couldn’t be a worse job. I’m gonna have to take it to a professional I think. At least the front speakers work for now, when I have the cash to do apple CarPlay I’ll just have the whole system fixed properly.

 

Figuring out what was cut/spliced or what goes where with wires is a mess. Definitely something a pro installer can sort out. Good to hear you found the problem.

 

Ok so I’ve decided to have a play myself. Ordered the RP4 CH11 and when the car doesn’t need to be driven I’ll take the dash apart again and have a better look. Found a few YouTube videos that might be the solution. Fingers crossed it’s just the front and rear speakers that have been messed with or a factory amp bypass that’s been installed and not too much needs to be done

 

Update.
got the CH11 installed.
Still only sound from front speakers.
Checked the amp and found it had been unplugged so plugged it back in.
Got a god awful sound from all speakers immediately when turning the car on.
Could this be a bad amp?

 

I've read/heard from a few people that the Boston Acoustics system in the Patriot/Compass was a PITA to upgrade. My guess is that maybe a previus owner had his radio die and hacked a new one in, possibly running new wires directly to the front speakers and just ignoring the rear speakers.

 

Totally possible. I can’t find any info online about what goes where in the factory connectors, for the deck or the amp so there’s not a huge amount I have to go off

 

It could be the amplifier.

I think if all the wiring is now fixed and the blue box you got is set up right. Everything should be good.

What kind of aftermarket stereo does it have?

 

I’m fairly certain the blue box is set up correctly. Just very confusing as to why the system would behave that way when the amp is plugged in. The amp harness is fairly chopped up too.
any resources on whatgoes where would be incredible but so hard to find

 

No guarantees, but this might help.

The 2014 wiring diagrams are here as another reference:

Wiring Diagrams

Downloadable PDF - 2014 wiring diagrams

www.jeeppatriot.com