Wiring Diagrams Needed Asap Please !!!

995 Views 70 Replies 5 Participants Last post by Sneaky Pete, 16 m ago

Theterpteam

Discussion Starter · 9 d ago

Hello there guys of the SLK world I recently just purchased a lovley SLK and need a few wiring diagrams as I have a few minor issue that are causing me alot of stress and sleepless nights, i really hope someone can provide me with the diagrams and maybe shed some light on my situation

Car model: 2004 slk 3.5L R171

I need atleast theese 4 diagrams as far as I know ...
Power distribution diagram
Ground distribution diagram
Sataliete radio diagram
Comand auctuation diagram

Could someone please provide me with this it will be very much appreciated.

Then I will explain my issue further and we can see if we can sort the issue ...

41 - 60 of 71 Posts

Theterpteam

Discussion Starter · #41 · 5 d ago

Okay here is an update I think I have 100% found my issue but fixing it maybe another story

I have checked rear sam unit all seems fine from what I can see

I also checkes the fuse box near the steering wheel all seems okay there

So before I started removing the carpet to check the audio gateway and can bus, I went back to the front engine bay SAM just to double check all fuses all did seem okay apart from one of the last ones I checked wich is fuse 47 i believe its is linked to the cigarette lighter and ashtray illumination, interior sockets, and radio systems.

And it kinda confused me as I took the fuse out and fuse seemed okay so i double check it with meter all good but I popped a new fuse in anyway just in case but still reading nothing on my multi meter no battery voltage on DC on that fuse only all other fuses in SAM reading fine, then I switched it to OMs and once again that is the only fuse with an issue.

So i think i can safely say i have probably found the culprit but how do i sort it lol :L

See less See more

Turbo

· #42 · 4 d ago

Not sure I understand that last sentence.. What did you do exactly?

You took out fuse 47, checked it with an OHM (?) meter and it was ok? How exactly did you check "multi meter no battery voltage on DC"!??

"switched it to OMs and once again that is the only fuse with an issue" - how did you deduce that?

Theterpteam

Discussion Starter · #43 · 4 d ago

I checked every fuse in that SAM module with the the multi meter on DC with car/engine of every fuse was reading 11.6/11.9 volts apart from fuse 47 wich is giving me no reading, with car/engine running every fuse is reading between 13.6/13.9 volts once again apart from this fuse, I am gonna do le check it again this morning

But after I checked it on DC as I said I removed the fuse and tested both ends on the OHMs setting on the meter and all seems okay I even popped a brand new fuse in the SAM just to be sure but still te only one in the module with no voltage 🤨

Turbo

· #44 · 4 d ago

Ok, thanx.

So it's "something" before that then.. You might want to take the breaker box out and look underneath. MIGHT be a loose or corroded wire where you can't see it from up-top.. ?

Theterpteam

Discussion Starter · #45 · 4 d ago

Turbo said:
Ok, thanx.

So it's "something" before that then.. You might want to take the breaker box out and look underneath. MIGHT be a loose or corroded wire where you can't see it from up-top.. ?

Yes I am guessing so has any one got a wiring diagram so I can see how it all runs for example head unit - audio gateway - bottom of fuse box or head unit - bottom of fusebox direct as I'm abit unsure🤞😇

Sneaky Pete

· #46 · 4 d ago

Theterpteam said:
Yes I am guessing so has any one got a wiring diagram so I can see how it all runs for example head unit - audio gateway - bottom of fuse box or head unit - bottom of fusebox direct as I'm abit unsure🤞😇

Here you go. Wiring diagrams for front SAM sheet 1-3. Fuse 47 on sheet 2 seems to be only for the cigarette lighter,does not look like it has something to do with the radio. You may be chasing a red herring here.

Reactions: 3

Theterpteam

Discussion Starter · #47 · 4 d ago

Update for you guys ...
I have took fuse 47 out again and give it a slight clean and now have the fuse reading 13.7/13.8 v when engine is on still reads nothing with engine off not sure why lol :/ so back to the drawing board as I'm guessing maybe that this is not the issue as when engine on that fuse read 13.7/13.8 as does the battery but the 12v live that's goes to my headunit still only reads about 4ish volts ... any ideas ? I will take some photos of the wiring inside the car for you to look at and hopefully we can finally figure out the issue lol 🤞😇

Sneaky Pete

· #48 · 4 d ago

Theterpteam said:
but the 12v live that's goes to my headunit still only reads about 4ish volts ... any ideas ?

Afaik the HU is on fuse 41 of the interior fuse box.
Step 1: Disconnect power wire from HU and measure fuse with ohm meter.
Step 2: If okay take out fuse and measure voltage on hot side of fuse connection.
Step 3: If not okay you found the culprit. If okay put fuse back and measure again on both sides of fuse.
Step 4: If okay measure volt at the other end of wire at HU. If okay culprit is HU. If not okay culprit is wire.

Can't think of anything else.

Reactions: 1

Theterpteam

Discussion Starter · #49 · 4 d ago

Sneaky Pete said:
Afaik the HU is on fuse 41 of the interior fuse box.
Step 1: Disconnect power wire from HU and measure fuse with ohm meter.
Step 2: If okay take out fuse and measure voltage on hot side of fuse connection.
Step 3: If not okay you found the culprit. If okay put fuse back and measure again on both sides of fuse.
Step 4: If okay measure volt at the other end of wire at HU. If okay culprit is HU. If not okay culprit is wire.

Can't think of anything else.

I have check fuse 41 and 26 at the fuse box near steering wheel and they do have a slight drop in voltage at one moment its reading 13.8 as is should next it was flickering from 6v-11 then back to 13.8 for a split second on fuse 26 and fuse 41 but took the fuses out and they seem okay ... 🤔

Turbo

· #50 · 4 d ago

Sure you have a good ground when you check?!

Fluctuating like that, I'd suspect user error instead

.

Theterpteam

Discussion Starter · #51 · 3 d ago

Turbo said:
Sure you have a good ground when you check?!

Fluctuating like that, I'd suspect user error instead .

Yeah I had a good ground, how does the unit wiring run is HU - audio gateway - fusebox
Or HU - Fusebox

And obiously there is ...
Fuse 26
Fuse 41
In the steering wheel fuse box

There is also fuses ...

Fuse 47
Fuse 64
Theese are in Front SAM Module

There is also fuses that may play a part also ...
Fuse 3
Fuse 19
These are in Rear SAM Module

How are this all linked up to the head unit does it all meet at a point in the car for example the Audio gateway and then is my 12v power lead is fed of that ?

There has to be something wrong with the connection somewhere down the line I think.

See less See more

Sneaky Pete

· #52 · 3 d ago

Theterpteam said:
Yeah I had a good ground, how does the unit wiring run is HU - audio gateway - fusebox
Or HU - Fusebox

And obiously there is ...
Fuse 26
Fuse 41
In the steering wheel fuse box

There is also fuses ...

Fuse 47
Fuse 64
Theese are in Front SAM Module

There is also fuses that may play a part also ...
Fuse 3
Fuse 19
These are in Rear SAM Module

How are this all linked up to the head unit does it all meet at a point in the car for example the Audio gateway and then is my 12v power lead is fed of that ?

There has to be something wrong with the connection somewhere down the line I think.

HU and AGW have their own power. Independent from each other. They talk to each other through a ring configured optical net work,called the MOST ring. To extensive to explain here.
Read the attachment. That will give you an idea. Forget the old days of a simple radio with CD changer. All computers now.

Reactions: 1

Theterpteam

Discussion Starter · #53 · 3 d ago

Okay so the 12v power lead that is reading between 3/6volts I have that plugs in the back of HU where does that run exactly from head unit too where ?
sorry to be a pain ? Lol 🤞😇

Theterpteam

Discussion Starter · #54 · 3 d ago

2

Sneaky Pete said:
HU and AGW have their own power. Independent from each other. They talk to each other through a ring configured optical net work,called the MOST ring. To extensive to explain here.
Read the attachment. That will give you an idea. Forget the old days of a simple radio with CD changer. All computers now.

What am I dealing with here it seems the actually 12v lead I've been testing seems thinner that the other red/blue below it, how will they be connected as I guess they are but I cant see no connection what so ever ... 😕

See less See more

Sneaky Pete

· #55 · 3 d ago (Edited)

2

It is connected to an intermediate connector.

A40/3 is your HU. Power from fuse 41. 2.5 mm2 wire to intermediate connector Z7/40z1. From there thinner 0,75 mm2 wire to HU.
Maybe Z7/40z1 is where your problem is. Don't know.
I'll see if I can dig up where that connector Z7/40z1 can be found.
See attachment.

See less See more

Reactions: 2

Theterpteam

Discussion Starter · #56 · 2 d ago

Sneaky Pete said:
It is connected to an intermediate connector.

View attachment 628700

A40/3 is your HU. Power from fuse 41. 2.5 mm2 wire to intermediate connector Z7/40z1. From there thinner 0,75 mm2 wire to HU.
Maybe Z7/40z1 is where your problem is. Don't know.
I'll see if I can dig up where that connector Z7/40z1 can be found.
See attachment.

Okay perfect thankyou, if you could dig up where that connector is that would be great I am going to take some photos of where I think it may be aswell fingers crossed we can work it out 🤞😇

Sneaky Pete

· #57 · 2 d ago

Theterpteam said:
Okay perfect thankyou, if you could dig up where that connector is that would be great I am going to take some photos of where I think it may be aswell fingers crossed we can work it out 🤞😇

Uhmm..I think it is in the attachment......👓😉😁

Theterpteam

Discussion Starter · #58 · 2 d ago

Would this be it here mate ... 🙃😇

See less See more

Sneaky Pete

· #59 · 2 d ago

I can't say for sure. But if from there a wire runs to the power terminal of your Comand HU then chances are that indeed is the little bugger. 😁

Theterpteam

Discussion Starter · #60 · 2 d ago

Sneaky Pete said:
I can't say for sure. But if from there a wire runs to the power terminal of your Comand HU then chances are that indeed is the little bugger. 😁

Yes that thicker wire going into the yellow casing is the 2.5 mm live wire from the fuse I'm guessing just wanted to confirm and as you see there is a thinner same coloured wire that comes out of that that runs to my headunit wich I guess would be the 0.75 mm live is that correct ? 🤞😇

And you see it has loads of black sticky banding around the wires what is the best way to remove that as it is like glue 😅😂

41 - 60 of 71 Posts