: CD changer wiring in a Fleetwood 1996.



jonl
10-02-10, 03:09 PM
I drive a 1996 Fleetwood Brougham, does anyone know if it's pososible to install a factory CD-changer and get it working with my Delco audio unit (UPO audiosystem, with CD-player). (manufactured Dec 19 1995) it has these numbers on it:
Partnumber: 16200363 BKCU
Product ID: 2001
898KCURL 53530048
The CD-changer wiring seems to be missing in my trunk. I only found a small extra connector in the trunk, I believe it's for a cellular phone equipment. It has only three conductors attached and a separate (I think) antenna cable.
The Fleetwoods cars that have the ULO system (only casette without CD player) had an option with dealer installed CD changer. Could it be that all cars with ULO have this extra cable and the ones with UPO have not ?
Perhaps the wiring to the trunk have these lacking conductors in the bundle but they are not attached to a connector ?
Is it possible to buy an aftermarket harness, between the radio and the cd-changer in the trunk ?
I would be glad for some information on this subject.

cadillacmike68
01-21-17, 01:45 AM
PM doesn't seem to work.
I have the exact same situation. I also have the service manual and it mentions the 12 disc changer but NO schematics ?!?!? I can't seem to find the wiring in my trunk either. Any ideas?

Does ANYONE here have a 1995 or 1996 Fleetwood with the 12 disc trunk changer?

Cadillacboy
01-22-17, 02:31 AM
12 disc changer ? I have not heard of them , must be a big deal back in those days . Excuse me but why bother to deal with these antiquated devices ? When we bought our ride it came with SONY aftermarket CD Changer too , I don't recommend anyone having these installed in their cars .CDs were broken (may be due to being MP3 rips ) and sometimes you could hear stranged whiz buzz sounds and you have to pick a clean FM station to get the CDs to play
Now, we replaced it with SONY Car Audio system it also supports Bluetooth as well as rear camera .

brougham
01-22-17, 01:00 PM
They were only dealer installed units and it hooked up differently then the factory ones.
I had an FM modulator changer in my Deville and never had any problems with it. You can get them cheap on ebay. But why bother now days when you can just use an ipod.

cadillacmike68
01-24-17, 02:26 AM
Some of us might want to keep the original radio, for various reasons. Maybe perhaps because mine is a Cadillac national award willing show car.

The GM 12 disc changer was both a factory and dealer installed option. I just can't seem to locate the harness connector in the trunk. It is also a direct connect - not an FM modulator. I had the changer in my 2000 ElDorado convertible and it worked perfectly. Now that car is gone and I'd like it in my 1996 Fleetwood.

Here are some GM part #s

My 12 disc changer: 12462981
GM superceded with this #: 25678544
1996 Fleewood harness #: 16231732

The 2 numbers for the disc changer show up in various places, but the I can't find the harness part # anywhere. Maybe someone has some insight.

brougham
01-24-17, 07:08 PM
I can't find my 1996 brochure, but 1995 the cd changer was an add on and not a factory option.
It is very possible that if it did change to a factory option for 96 it only got the harness if the car came with the option, that's how some makes did it.
Is the changer the right one for Fleetwood? Some people here have found that even with a Delco changer if it wasn't the one the car was supposed to come with they weren't able to make it work.

cadillacmike68
01-24-17, 07:14 PM
I can't find my 1996 brochure, but 1995 the cd changer was an add on and not a factory option.
It is very possible that if it did change to a factory option for 96 it only got the harness if the car came with the option, that's how some makes did it.
Is the changer the right one for Fleetwood? Some people here have found that even with a Delco changer if it wasn't the one the car was supposed to come with they weren't able to make it work.

Hi, Yes, the changer is the correct one for the car. I checked the part #s with the dealer. The 12462981 was the original PN and was superseded by25678544 for 1996-2002 (or 05) Cadillacs. Probably a firmware update because they look the same.

I'll have to really dig in the back. I have to partially remove the trunk liner anyway to replace the power pull down switch which is acting up (literally). I hope I don't have to replace the harness, but then again my Eldorado came with the harness wire already there...

Shalmaneser
05-20-17, 11:44 AM
This thread has been dormant for a while, so maybe this will help those of you with 96 FWs who have been frustrated over the lack of info with regard to the "factory" 12 disc CD changer.

Here's what I know and believe to be the deal:

We know there was a CD changer option for the 96 FW. It says so in the service manual. I don't know about the 95 or earlier FWs, and am not overly concerned about them in this thread, as they use different wiring. Sorry to those of you with earlier models. I have one myself.

I've spent a couple hours poking through online posts, and looking through the service manual. What I've concluded is that the 96 radio is special, in that it ties into the OBD system wiring, which was new for 96, through the Data Link Connector. I thought that this was part of the anti-theft feature of the radio, but on closer inspection, it doesn't appear to be. I think that GM started that later, thankfully. So why would GM do this?

Interestingly, the optional cell phone also ties into the same Data Link line as the radio. There is a second Data Link line, line 9, for the various computer control modules, which is what the OBD connector is really used for, in terms of scanners reading codes. But the radio doesn't tie into this line. I think GM borrowed a line of the OBD system for it's own use, to link the various audio related components together with a serial data channel, in this case, line 14, which is normally unused, according to the OBD spec.

In looking at the two connectors on the radio, one is a holdover from the 93-95 models, powering the speakers - C1 - 10 pin. The other connector is the new, weird one - C2 - 10 pin, which has the line 14 Data Link line, position F - DLC SERIAL DATA LINK, and a set of 3 aux inputs, consisting of AUXILIARY GROUND, RIGHT AUXILIARY INPUT, CELLULAR PHONE AUDIO, and LEFT AUXILIARY INPUT, CELLULAR PHONE AUDIO. These are shown connecting the "stereo" cell phone. But a cell phone isn't stereo. I think the two channels are probably for the handset and the remote mike. I think these aux connectors are for the CD changer as well, as the wiring diagram I found for it shows a set of 3 connectors - L-R-Common going to a radio aux input. This makes sense, if you look at the wiring for a standard Pioneer CD changer of the time, with their IP BUS connector. I think that GM simply borrowed the Pioneer system, and changed the connector. And then forgot to properly document it in the service manual. Why GM chose not to standardize the radio in the FW with the ones used in every other car they made that year is quite the mystery. And a PITA...

459338

459346

If this is the case, then the only questions remaining are if the non-CD radio can control the changer (which I hope is the case, given that it has a CD button on it), and if there is a harness in the trunk, waiting to be connected, whether it's for the cell phone or the CD changer, or both.

The CD changer that I have is a Pioneer unit, made for use in just about every GM product in the late 90s, it seems. It apparently replaced an earlier DELCO unit.

It gets more confusing, because there is also a Pioneer unit that transmits to the radio over FM, but uses some connections to control the unit as well.

I know it's ancient technology, but it would be kind of cool to wire in a 12 disc changer. Supposedly it will read burned discs as well. I'm guessing that the cell phone would take priority over the radio or the CD changer, via the Data Link line, which would make sense. Anyone ever use a 96 FW factory installed TDMA cell phone?

The other good news is that it would be relatively easy to add in an aux port for an iPhone or iPod, given that the aux connectors are already there. I see IP BUS adapters for sale, using the standard PIONEER connector, at most, one would have to splice into a few lines. All of a sudden the 20 year old radio doesn't seem so dated anymore!

I'll update once I have a chance to play with the unit some. In the meantime, I hope that this may be of interest to those of you who have been contemplating this mod.