Reintroducing Stock Stereo (CM5908) on 325i Touring (Japanese Import)

[jkm500]

Hi folks, hoping someone can help (I've read countless posts here and elsewhere, and though close, would love some confirmation)!

My 1990 325i (Touring, japanese import, no dash faders) had a harness in the dash for a stereo. I'm 95% confident the colours are as listed below.

My questions:

1. does anyone know what my "blue" wire, running a continuous ~7.5v (regardless of whether engine or lights are on/off) is / where it goes?
2. is it ok to have the two rear +'ves on a single channel off the stereo (ex. both LR and RR +'ves to the LR stereo output ... yes I know I'll only be getting the LR out of both speakers, but the RR is "buzzy" so prefer just skip it)?
3. is it ok to ground all Browns/-'ves together ... logically that should work, but ... ?

I'll be adding a donor stock stereo (CM5908), and pretty sure I've figured that out too ... one question here:

1. Can anyone double check what I've got in the stereo image?

INFO:
Wires in Harness:
Blue/Red: +'ve RF
Blue/Brown: -'ve RF
Blue/Purple: +'ve RR
Blue/White (or faded yellow): -'ve RR
Yellow/Red: +'ve LF
Yellow/Brown: -'ve LF
Yellow/Blue: +'ve RF
Yellow/White: -'ve RF

Red/Green: live (always on)
Brown: -'ve (ground)
White: antenna
Purple/Grey: 12 v switched
Red/Grey: illuminator
Blue: ????????? (holds 7.5 v whether on/off, lights on/off, etc)

IMAGES (hopefully they come thru??)
rear stereo: https://drive.google.com/open?id=19V...j0AdpmUDWU-oyZ

Harness: https://drive.google.com/open?id=1pi...-j7EOwqdo3lwmB

Harness: https://drive.google.com/open?id=1C3...BxdtVFH6b1JmlA

Appreciate any help ...

[george graves]

https://www.the12volt.com/

[jkm500]

Thanks George - was able to find some info, but unfortunately colours noted don't align with what I found (whether online in other posts, or in the car)!

Anyone else ? Thanks in advance !:)

[Todd Black 88]

That looks like the late model euro harness. It uses an e36 style plug.

Does your harness plug have a sliding piece on it?

Edit:

The stock deck you have there is a common ground deck. Your harness looks to be a separate ground setup. I would grab an e36 deck and try it.

I have an late euro e30 deck with an e36 style input you can test.

Pm me if you want to look

[jkm500]

Todd. Thanks and will do. Maybe just seeing some pics of the rear of the unit you have would help point me in the right direction!

Regardless, sent you a pm. Thanks