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Uconnect RA2 to RA4 upgrade assistance


This is a discussion on Uconnect RA2 to RA4 upgrade assistance within the Audio & Electronics forums, part of the 4th Gen : 2009 - Present category!
Hello Ram Forum. I am a new 2014 RAM owner that was unfortunately unable to find the truck configured how ...


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Old 08-10-2014, 12:04 PM   #1 (permalink)
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Default Uconnect RA2 to RA4 upgrade assistance
Hello Ram Forum. I am a new 2014 RAM owner that was unfortunately unable to find the truck configured how I wanted with the 8.4 inch touch screen. My truck came with the Uconnect 5, which isn't a bad system, but it was just not the head unit I wanted.

I have purchased the 8.4AN RA4 with the manual climate control bezel from a salvage. I did this knowing that A) the actual head unit is (mostly) plug and play and B) the climate control bezel is not "compatible".

I have read that the new radios are "not interchangeable" but I am not buying that because there are several sources that have proved otherwise. I could just drop in the 8.4 unit and live without the volume and tune controls on the bezel while using the steering wheel controls, but that's not good enough for me.

I did try that techauthority wiring diagram link elsewhere in this forum but even putting in the VIN from the truck this radio came from it still only shows the non 8.4 wiring best I can tell. Clearly there is a missing link and I really hope to find a way to make it work.

So here is my dilemma. I need to know what the trucks with the 8.4 screen climate control wiring harness looks like. It is my hope that someone with knowledge or would be willing to offer assistance with some pictures might be able to get me further along. What I cannot determine at this point is whether there is a module that plugs into the climate control 24 pin connector and then a bridge to plug into the 8 pin bezel, or if the wiring harness itself is different.

Thank you in advance.


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Old 08-10-2014, 12:44 PM   #2 (permalink)
 
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I can physically make a harness to connect to the new bezel. However, I do not know if it will work without a BCM flash.

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Old 08-10-2014, 01:01 PM   #3 (permalink)
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Here are the images of the climate control wiring harness connector along with the back of the Uconnect 5 RA2 climate control bezel and the Uconnect 8.4 RA3/4 manual climate control bezel.
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climate_wiring_harness_2_.jpg   uconnect_5_manual_bezel_2_.jpg   uconnect_8.4_manual_bezel_2_.jpg  

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Old 08-10-2014, 01:02 PM   #4 (permalink)
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Originally Posted by jeepguy_1980 View Post
I can physically make a harness to connect to the new bezel. However, I do not know if it will work without a BCM flash.

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Oh? I would be interested. A BCM flash, is that something I could get the dealer to do? What would it involve?
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Old 08-10-2014, 01:08 PM   #5 (permalink)
 
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It's not something the dealer can do easily. If a BCM flash is required, you will need to get your dealer to email Chrysler engineering, and have them add the appropriate sales codes to your VIN. Then the dealer can re-flash your BCM. I've only successfully seen this done once.

All that said, I've seen someone successfully upgrade their radio to the 8.4. The only issue they had, was that the volume knob would not work. If feel fairly confident that this can be fixed without a BCM flash, but I cannot be certain.


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Old 08-10-2014, 01:12 PM   #6 (permalink)
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Originally Posted by jeepguy_1980 View Post
It's not something the dealer can do easily. If a BCM flash is required, you will need to get your dealer to email Chrysler engineering, and have them add the appropriate sales codes to your VIN. Then the dealer can re-flash your BCM. I've only successfully seen this done once.

All that said, I've seen someone successfully upgrade their radio to the 8.4. The only issue they had, was that the volume knob would not work. If feel fairly confident that this can be fixed without a BCM flash, but I cannot be certain.
Good information to know. Very much appreciated.

Are you familiar with the wiring? Is there in fact a different wire harness for climate control? Before I started on this I spoke with my dealers parts department and they didn't think there would be a problem with the actual wiring. Of course they also stood by the fact that this could not be done but that's another story.
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Old 08-10-2014, 01:25 PM   #7 (permalink)
 
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Send me your VIN. I'll check on the wiring later today.

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Old 08-10-2014, 01:27 PM   #8 (permalink)
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Originally Posted by jeepguy_1980 View Post
Send me your VIN. I'll check on the wiring later today.

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PM Sent. Thank you much!
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Old 08-11-2014, 11:29 PM   #9 (permalink)
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Interested in how this works out. It may be an uograde I look into if you get this too work.


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Old 08-13-2014, 07:45 PM   #10 (permalink)
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What's the difference between the RA4 and VP4? From what I've read before, the RA4 wouldn't work unless you had the volume controls on the steering wheel. From looking at a VP4, it comes with the volume controls on the bezel already.

Would this work on a RAM?

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