09 Tahoe - Wireless Headphones only plays on right side

[Just Fishing]

As for the original equipment...
I think these are all of the related RPO codes...

UK6 RADIO CONTROL REAR SEAT & EARPHONE JACKS
UPF WIRELESS INTERFACE SHORT RANGE, VOICE REC
UQA SPEAKER SYSTEM PREMIUM PERFORMANCE ENHANCED AUDIO
UVA RADIO AM/FM STEREO, SEEK/SCAN, AUTO TONE, CD, CD-R MP3, DVD, CLOCK, ETR, RDS
U2K DIGITAL AUDIO SYSTEM S-BAND
U42 ENTERTAINMENT SYSTEM REAR SEAT,SINGLE DISPLAY,REM CONTROL W/HEADPHONE

The PO also gave me the original deck with the sale, i have it sitting on a shelf in my home office.
the current deck: Pioneer AVIC-5201NEX
I love this deck.

I also have the speakers on the A pillar with "bose" on them.
but i don't see that marked on the original radio, nor anything about bose in the rpo codes.
possible it was added with the pioneer HU?

 

[kbuskill]

UQA is the standard Bose system

Y91 is the highend/digital Bose system

Your truck shouldn't have the speaker in the center of the dash.

The Y91 has the "smart" amp and the center channel speaker in the dash.

Have you checked all the settings on the HU?

My Kenwood has all kinds of different options for rear seat output and if it isn't set correctly it won't act right.

 

[petethepug]

You’ve got the remnants of someone’s piss poor install. Consider taking it to a shop that doesn’t use t-tap wire connections for installs.

You may stave off some damage to your system that hasn’t occurred yet if you have a pro look it over.


Sent from my iPhone using Tapatalk Pro

 

[Doubeleive]

I played with this a little over the weekend.
I have not yet pulled the Head Unit out to take a look to see what was installed etc.

The tv screen is a single that's attached to the roof, folds down etc.

However i did find a good set of headphones to test the jacks out.
Both rear Jacks don't appear to work at all.


Playing around with the replacement/aftermarket wireless headphones...
While testing i noticed that if i have a dvd playing, and the main screen on the pioneer unit has the movie playing as well.
If the headphones have channel "A" selected i get full stereo out of them!
The volume also increases when i turn up the main volume.
With this i also have the main speakers playing the same thing, going up with the headphones...

if i change the HU to play the radio, i then need to select channel B in order to continue playing the DVD
Channel A will play the radio, pretty much clones what ever the HU has selected
but with the single side playing...

sounds like the rse rca cable coming out of the headunit is only connected on one side, I think on ch a it will play off the main out and on ch b it only plays off of the rse output.
you will be able to tell right away as soon as you pull that headunit out enough to reach the cables and check them.

 

[Doubeleive]

when you get that far and if it looks like the cables are ok, then swap the left right rca cables and see if you still get the same result then you will know if it is the headunit or something after it.

 

[Just Fishing]

Nice, thanks!

might be a little bit before i get that far.
However i did get my tech 2 in the mail today.
first order of business, how the f to hook it up.
so many cables and adapters.

 

[Just Fishing]

UQA is the standard Bose system

Y91 is the highend/digital Bose system

Your truck shouldn't have the speaker in the center of the dash.

The Y91 has the "smart" amp and the center channel speaker in the dash.

Have you checked all the settings on the HU?

My Kenwood has all kinds of different options for rear seat output and if it isn't set correctly it won't act right.

I tinkered around with different settings in the HU, but nothing seemed to help.
I don't have a speaker in the center of the dash, just the two on the a pillar.

I also played around with my new tech 2 today.
Found it could not connect to the BOSE amp, not sure if that's because i don't have the original radio installed, or if it's just not present.

No code found in the RSA panel, i clicked buttons for a bit using educated guesing for the most part, all seems in order.

I did notice my rear screen is way fkn hot, w/ no dvd in the radio!
I think i may start keeping the Rear output "off" to see if it helps...

also, the tech 2 is fkn cool!

Next i'll pull the HU...
I also got a code for the rear lift gate, fails diagnostics.
Using the "special function" and cycling the lift gate up and down, i see a "hall sensor" short to ground when operating.
I have a strong feeling it's the hack job of an install, and i bet the power the installer tapped into for the rear camera is related... wild guessing here.


I need to go through the entire install, probably before the truck catches fire.

 

[PG01]

I tinkered around with different settings in the HU, but nothing seemed to help.
I don't have a speaker in the center of the dash, just the two on the a pillar.

I also played around with my new tech 2 today.
Found it could not connect to the BOSE amp, not sure if that's because i don't have the original radio installed, or if it's just not present.

No code found in the RSA panel, i clicked buttons for a bit using educated guesing for the most part, all seems in order.

I did notice my rear screen is way fkn hot, w/ no dvd in the radio!
I think i may start keeping the Rear output "off" to see if it helps...

also, the tech 2 is fkn cool!

Next i'll pull the HU...
I also got a code for the rear lift gate, fails diagnostics.
Using the "special function" and cycling the lift gate up and down, i see a "hall sensor" short to ground when operating.
I have a strong feeling it's the hack job of an install, and i bet the power the installer tapped into for the rear camera is related... wild guessing here.


I need to go through the entire install, probably before the truck catches fire.

A hall effect sensor is basically a switch that uses magnetic fields to vary voltage output. They are used for proximity sensing, positioning, and speed detection.....like when to stop the tailgate or how fast it goes or if it’s open or closed.... some shit like that.

 

[Just Fishing]

I got the radio pulled.
Here is the pile of wires i found, connectors look ok...
Debating if i want to redo them my way or not.

Here is a close up of the module,

And this is in the "Rear Audio" port.
Someone's creation from the looks of it...

 

[Just Fishing]

I tinkered around with that RCA to jack adapter mess a little.
I found that if i unplug the connector so just the center part is still connected, but the outer is not.
Then i get stereo.

I also get a lot of interference no matter how it's connected.
So, i have a new adapter on order...

 

[Just Fishing]

I found another adapter cable in my pile o wires (I'm a hoarder), and gave it a try.
No change
Also switching the rca ends resulted in no change.
Audio only comes out of the right side no matter what...

Unless of course, i keep the connectors only partially connected, then stereo!

 

[Just Fishing]

So playing around with it more, i noticed that the right side is much louder if fully plugged in, so now i'm going with that one of the sides is not wired correctly.
I pulled the little adapter out, had a bundle of wires all taped together.
Found another set of RCA's attached to it...
So now i suppose, i need to thumb through a wiring diagram to see what's where.

 

[Just Fishing]

Well i decided to plug the harness back in and try swapping RCA's, hooked it up just like it was...
But i forgot to reconnect a ground wire that it had going to the most retarded ground location i have ever seen.

The ground was one of those insert connectors, you know the type that rattle.
I was planning on clamping it to a better location but forgot...

So I'm thinking the ground was the problem, so i try pushing it onto a grounding location and 0 change.
I still have stereo, nice and loud.
I have no idea wth, either way I'm calling this a win...

 

[Just Fishing]

well i decided i couldn't stand the rats nest of crimps, and cut each wire, crimped, soldered, and shrink wrapped with some marine grade stuff.
Topped it off by wrapping the wires with that same felt tape that i see on the factory wiring harness.

Decided to test it once more, and the same issue came back!

Did tested the wires, and finally pulled the connector apart, and swapped the "input RCA's with the "To rear audio/video"
same issue.
took the other wires i removed and put them into the connectors.

Stereo!

so i widened the pin connectors to make a better connection, and soldered the pins to the wires while it was apart...
Rosin also has a cleaning effect, so i figured why not.

All back together, and back to stereo headphones!

While working on the unit i would hear a click here and there come through the headset and the sound would go off.


Sat in the back after it was all wired back up, and watched the red infrared type of LED's click off when it happens.
I can turn the truck off and back on again, and it will work for a few more minutes.

yay! lol

Only difference is i took the ground wire that went to that terrible ground and gave it it's own little connector in the harness.
No change if connected or not, so i doubt it's the issue.

So tomorrow, i'll break out the tech2 and see if i can pick anything up.

 

[Just Fishing]

I also found out that the remote for the rear screen appears to be PN: "20929305"
I found one on ebay for about $30 shipped, so i placed the order.

I also found that i can replace what appears to be the module for the wireless audio, i don't see a listing for it on gm parts direct, but i can find it on ebay...


Also, while i'm digging into this, does anyone know if the lcd screen should shut off when closed?
I'm wondering if i have a broken switch or something.

 

[Just Fishing]

So nothing on the tech 2
good chance i may need to hook up the factory radio in order to get a good scan.
I do have it, hopefully it works.. lol

For now, i think i'm going to go ahead and order the rf module for the headsets to see if that does it.

If not, then i'll probably try the factory radio.

 

[Just Fishing]

Well i replaced the little wireless headset module a few days ago in the overhead monitor housing...

Maybe slightly better, full stereo, never changes.

But it does fail after a few minutes of playing, clicks and i can see the lights turn off on the RF transmitter..
Came back on after a few seconds, and then turned off and stayed off after another minute.

I also tried the remote i bought, it did absolutely nothing!

so it looks like the next step will be to put the factory radio back in to see if the tech2 can pick anything up.
but that's on the "later" list for now...