Thread: 2004 Bose amp wiring diagram needed

I'm going to be hooking up a small sub in my son's '04 Envoy and trying to find the Bose amp wiring diagram to tie into the front door speaker pre-amp wires. I have done lots of searches on multiple sites and have found the 2005 (LUX version) but nothing for my '04 (non-LUX version). Any input is appreciated.

These are for an 03 with premium audio. Since you specifically mentioned the front door speakers it sounds like you already know why folks recommend using them. So I included the amp output diagram as well.

MAY03LT, thanks for the diagrams and thanks for all the maintenance videos you've done. Pink Floyd would be proud of your singing too

On more thing MAY03LT, do you mind telling me which are the front speaker pre-amp leads? The schematic is too small for me to tell and when I make it larger it just gets fuzzy. Thanks!

+left -
-left -
+right -
-left -

Originally Posted by Guenther

On more thing MAY03LT, do you mind telling me which are the front speaker pre-amp leads? The schematic is too small for me to tell and when I make it larger it just gets fuzzy. Thanks!

They sure are, shame on me for not previewing the post.

These are the front low level outs from the radio to the amp.

+left - tan
-left - dark green
+right - light green
-right - orange/black

These are the outputs from the amp to the front doors (after being eq'd).

+left - tan
- left - gray
+ right - light green
- right - dark green

I haven't done this myself but I've heard all kinds of opinions on which way works best. The majority says that the outputs from the amp to the front doors are preferred for subwoofers.

Originally Posted by Guenther

MAY03LT, thanks for the diagrams and thanks for all the maintenance videos you've done. Pink Floyd would be proud of your singing too

You're welcome!

You da man!

Nice timing fellas. My buddy wants me to help him install some subs in his stock Voy w/Bose, this is just the info I was about to search for.

I got it all wired up in anticipation of the amped sub coming and I'm a little corn-fused. Listed you have the post-amp as:

+left - tan
- left - gray
+ right - light green
- right - dark green

I did not have a gray wire but an orange/black instead in the bundle of front wires so it wasn't like the diagram above nor like the 2005 lux version. I'm hoping I'm good to go but until the amped sub gets here I won't know. I did some searching and it looks like GM used my 2004 amp (#15112641) for only a few months and then went to the non-lux. I used the rear fuse panel for power since it's only 150W max and a ground on the rear seats. Finding the trigger is the hard part I think. I tied into the radio fuse but I don't know if that will work because I think I read that it wouldn't power on others because it is a pulse signal. I can't see anything that will give power in the ACC and only in the RUN. There is the fuse for the Bose amp but I don't want to overload that circuit. I'm not sure where to tie into

The remote signal just triggers the relay in the amp to draw power from the main source. It's not drawing enough to overload anything.

Where to find switched power:

If you go to the ignition switch:
RED on the ignition switch is 12V, fused by underhood fuse #34, and feeds the following three circuits:

White is hot in ACCY, RUN, START
Orange is hot in RUN
Yellow is hot in START

RED/WHITE is another 12V, fused by underhood fuse #36, and feeds two circuits:

Brown is hot in ACCY, RUN
Pink is hot in RUN, START


If you go after the fuse block path, using an add-a-fuse gadget:

On in RUN/ACCY modes only:

rear fuse #29 - Rain sensor (rare option) 10A
rear #33 - front wiper motor - 25A
rear #31 - TBC ACC - 3A

ACCY, RUN, and START:

rear fuses 47 (IGN 0)
50 (TBC IG)

RUN only mode:

front fuses 22 (IGN E)
16 (TBC IGN 1)
27 (BACKUP)
28 (PCM 1)
54 (AIR SOL)
53 (O2 A
54 (O2 B)
26 (ENG 1)

Plus some fuses that are fed by RAP that I haven't documented yet.

Originally Posted by Guenther

I did not have a gray wire but an orange/black instead in the bundle of front wires so it wasn't like the diagram above nor like the 2005 lux version.

I compared the original diagram posted with one from an 04 and they are identical.

What they are showing is in the amps 24 pin connector, one row has 4 empty cavities followed by Tan and then Gray. Those are the LF outputs from the amp. The two next to them, light green then dark green, are for the RF outputs. The other row has every cavity filled, including the nearly identically-colored input wires, again all next to each other (org/black, light green, dark green, tan).

If your 24 pin does not have the wires oriented that way, let me know what is different and I'll see what I can find.

02-04 bose amp.jpgThe colors you gave match what I have also.

I've got no gray at all in that harness. I took several pictures knowing that I was probably going to need to put them up for help. Take a peek and let me know what you think. Thanks.

By Black LT's diagram I'm wiring to the wrong damn harness!?!?!!?

Roadie, thanks for the triggers. Black LT and MAY03LT, thanks for the diagrams.

Originally Posted by MAY03LT

I compared the original diagram posted with one from an 04 and they are identical.

What they are showing is in the amps 24 pin connector, one row has 4 empty cavities followed by Tan and then Gray. Those are the LF outputs from the amp. The two next to them, light green then dark green, are for the RF outputs. The other row has every cavity filled, including the nearly identically-colored input wires, again all next to each other (org/black, light green, dark green, tan).

If your 24 pin does not have the wires oriented that way, let me know what is different and I'll see what I can find.

The pins must be different on mine than the '03s because they had this Bose amp for a few months and then to the lux?

Originally Posted by Guenther

By Black LT's diagram I'm wiring to the wrong damn harness!?!?!!?

Nah, his UQA diagram matches mine, which I went and compared to all 03-07s with UQA.

I used your pics to compare to the amp pinouts, and low and behold, buried in the amp connector section, they have separate class2/non class 2 pinouts (at least in the 04 manual, I didn't check the rest).

In yours, which is class 2, the front door speaker outs are in the 8 pin connector that you posted, and the wire colors are the same that I posted earlier.

edit: now looking back it's obvious that the front door outputs are in C2. The pinout that I used for double checking was for C1 (non class2) and since everything "was there" it didn't raise a red flag.

Originally Posted by MAY03LT

Nah, his UQA diagram matches mine, which I went and compared to all 03-07s with UQA.

I used your pics to compare to the amp pinouts, and low and behold, buried in the amp connector section, they have separate class2/non class 2 pinouts (at least in the 04 manual, I didn't check the rest).

In yours, which is class 2, the front door speaker outs are in the 8 pin connector that you posted, and the wire colors are the same that I posted earlier.

GM can lick my butt with all the changes they make. Time for me to do some rewiring tomorrow but no big deal I guess. Thanks for all the help fellas!

Originally Posted by Guenther

GM can lick my butt with all the changes they make. Time for me to do some rewiring tomorrow but no big deal I guess. Thanks for all the help fellas!

Yeah, and classifying multiple audio systems under a single RPO code doesn't make our job any easier.

Thanks for posting the pics btw.

Got the Kenwood KSC-SW10 installed using the revised wiring. I put it in the rear cubby area so it's totally out of the way and you don't know it's even there. It's a small flat amped/sub and adds enough bass to make the Bose system tolerable. I'm pleased with the way it turned out and thanks for all the help.

Glad to hear that it worked out for ya, thanks for the update!