S40 2003 replace Hu-605

[catalax]

Hi,

This is my first time when i write here.
Today I choose to replace my old HU-605 with an aftermarket new stereo.
Beside speakers wires (8), the new stereo has only 4 wires more (red ACC - Power lead, yellow - battery lead 15A, blak - Ground lead, blue - motor antena).
But my old connector has many more wires.

I downloaded from internet the radio diagarm (see attachment) and I'm still confused.
Ex: inside the car I have one thin red wire and one thick orange wire (although I din't find any orange on schema just reds), one thin black wire and one thick black.
The new stereo has one black and one red by the same thickness...

Could someone help me with some indications?

[sebaveh]

Its simple:

Red (thick)- permanent power
Red (thin) - outpup signal for power antenna
Blue/brown - ground for V40 model
Brown/white - switched power
Black - ground
Green - speed signal
yellow/white - reverse gear signal
red/black - illumination

A6 pin position on green connector - mute for telephone.

[catalax]

So, if understand well, this is the correct wiring in my case:

Car: Red (thick)- permanent power -> battery lead=Yellow :new stereo
Car: Red (thin) - outpup signal for power antenna -> mototr antena=Blue :new stereo
Car: Brown/white - switched power -> power lead=Red :new stereo

Car: Black (thin or thick ?) - ground -> ground lead=black : new stereo
and what i do with other one after that ? It's realy need of two grounds ?

Am I right ?

Thank you very much.

[sebaveh]

Exactly.
Actually, it has 3 grounds for what I see here: On position 7, 8, and 12 on green connector. Don't ask me why, maybe it has something to do with audio, analog, digital grounds, coming together in one point or something like that.