Swapping Lux Nav into Non-Lux Truck... HELP

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isaact

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Hi everybody. First post here. Help a brother out! :)

This summer I bought a 2005 Escalade ESV Platinum with high miles, on eBay, which turned out to be a real shitshow. Needs a transfer case, front diff, rear air shocks and compressor, and thousands of dollars in interior and body repairs the eBay seller ever-so-thoughtfully did not disclose and photoshopped out etc. Awesome. EBay was good enough to cut me a check for part of the repair cost through their VPP insurance program, which covered the bodywork but none of the drivetrain work. Anyway, I am going to get rid of the truck.

BUT in the meantime, driving my two kids around... they have fallen in love with the RSE... the 2nd row Panasonic DVD (side style) and 3rd row flip down screen are awesome. In general the "lux" Bose stereo is awesome. It has the CDX and touchscreen nav, with "lux" smart amp etc... it also has on-star and XM neither of which I've activated since I bought the truck. I want to move all this stuff over to my new truck, that is replacing the Escalade.

Last month, I bought a cherry 2004 Yukon XL Quadrasteer with low miles and it's near perfect in every way. Essentially, all the options. Except... the stereo, nav, and RSE... this has the "non lux" Bose stereo, Onstar and XM, non CDX changer, no RSE, no happy kids watching DVDs while mom and dad drive up to the lake etc. I'm getting away with This Situation temporarily but long term I'm effed, and gotta get the Caddy system installed in the Yukon.

Which means I am trying to swap a "lux" Delphi/Bose system from a 2005 Escalade ESV Platinum into a "non lux" 2004 Yukon XL. We test installed the nav unit in the Yukon and it powered up and didn't freak out, until you switch off the power. So far so good. So I sent the nav head unit out to Carl Cowles at fixmyguages.com and he unlocked it. Great guy! Cool. Got it back, installed it in the Yukon and... big fizzle. Now, the head unit powers up and survives power cycle (VIN relearn working) but there is zero sound from any speakers. The amps look the same, connectors look the same, it's basically plug and play between the nav head unit and EITHER the "lux" amp from the Caddy or the "non lux" amp from the Yukon... but NEITHER is making any sound of any speakers.

What is obviously different is in the Caddy there is an extra connector and small ECU in the center console which seems to be connected to the BCM... this is just absent from the Yukon. Put everything in the Caddy, it works; move it into the Yukon, no sound. Dead end?

Seems like if we drag over the Caddy ECU and extra connectors... I'll still be screwed as the Caddy "stereo ECU" from the console, will be trying to talk to the BCIM / main ECU for the truck... will this work? Seems like the little computer in the 2005 "lux" center console is not going to want to talk to the 2004 "non lux" BCIM... my understanding is there is a bunch of signal processing happening on the 2005 "lux" BCIM... which if that's not there, the system ain't working. Is that correct? Because obviously we can't move the BCIM from the Escalade to the Yukon, if only because it's a different make and different version of the 6.0L, nevermind Quadrasteer, different stability control etc.

SO IS THERE AN OBI WAN KENOBI who can help me out here? My interiors/installer buddy and I are both kinda at our wit's end here. Obviously I could do something aftermarket, like headrest or standalone roof mount, but I'd REALLY prefer to move over the Bose/Panasonic system from the Caddy to the Yukon and keep it all OEM+ style rather than aftermarket.

Happy to talk to anybody who is 100% sure they know the answer, or whether this is a dead end. Just knowing the answer would be better than trying 3 more dead ends at this point... and of course, if we can Get 'Er Done that is the goal. I'm in the San Jose area if you want to meet up, otherwise please reply here so others in same situation can see the thread in future. I looked through the archives for an hour just now and don't see this exact issue in an older thread... maybe there's a link here or to another forum somebody has Been There Done That? :)
 

OmarR

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I am at work, so here is the short answer:

You also have to swap the amps. The lux amp works with the lux nav, non-lux amp works with the non-lux amp. There is absolutely no way around this.

ALSO.....the connectors at the amp have to be re-wired. You must pull out some of the wiring and position them in different slots. The input/outputs are different between the 2 amps.

The good news is that swapping amps and re-wiring will only take up a couple of hours of your time and no $$$.
 
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isaact

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THANKS for the reply. Appreciate.

OK when I plug in the lux amp (and the lux head unit, from the Caddy) in the Yukon, the connectors are "plug and play" and everything powers up... screen comes on, no lockup etc, but there is also no sound.

So when you say need to rewire at the amp, what needs to change?

There is a small blue ECU-looking thing in the center console in the Caddy which is not in the Yukon. What is that? It seems to be wired to BCIM (in a Y shape harness, where Yukon is just head unit <==> amp) and I guess that is source of problem.

Any links or photos or detailed instructions you can point me to?

:)

I am at work, so here is the short answer:

ALSO.....the connectors at the amp have to be re-wired. You must pull outsome of the wiring and position them in different slots. The input/outputs are different between the 2 amps.

Short question for your short answer: do you have the pinouts / rewiring instructions? :)
 
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OmarR

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I emailed you 2 files describing the changes you need to make.

Yes, all the connectors will "plug n play", but you are not getting sound because the re-wiring still needs to be done.
 
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isaact

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Hi everybody.

OK I've swapped in the Lux Bose amp into the non-lux Yukon, and migrated all the wires over to the new connector pinout shown in the instructions Omar (and others) provided. Thanks!

Unfortunately, it didn't work. The amp doesn't power up, no sound, no nothing. The guys at the shop doing this work are at the end of their rope, discouraged after 2+ weeks... so I am going to spend some time with them tomorrow (Saturday) trying one last time before we give up and put the Caddy and the Yukon back together the old way, not the right way.

Is there anybody out there... Omar, or anybody else who has personally done this swap (lux to non lux touchscreen nav + Bose lux amp etc) who wants to earn some $$ tomorrow talking to us on the phone while we work... we need a "ringer" to help.

Isaac in SF/SJ area
 
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isaact

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Thanks Omar. Nice call. Not what was supposed to be there. :) Spliced in the digital control signal from the RSA and the radio is working now.

Onto the 2nd and 3rd row DVD migration now. That harness is nuts, and seems to include the mystery Tecstar box (with about 30 wires coming out of it) which, weirdly, the system seems to work without. Curious if that will hold up with video too.

I wonder what the Tecstar box does...
 

OmarR

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I know this might be a little tedious....but can you tell me exactly which OEM wires they are spliced off of? color/position/slot

If they are just low/high level audio wires, then its probably just "enhanced digitial signal processing".
 

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