RE: W169 2005 180 CDi - fuse diagram -

[AndrewCS]

Hi,

I had a dipped beam error came up today and changed the bulb, still not working so I thought the next thing - fuse

Opening the fuse box and looking at the fuse diagram it shows: -

Lamps / front left / cornering lamp - 55 / 62

Lamps / front right / cornering lamp - 55 / 62


Here's the thing - my fuses are only numbered up to 54 and in the last row - 46 - 54 there are only two slots used.


I've looked on the net / You Tube etc but none shows my fuse config.


Help please


Thank you for any input, much appreciated


Andy

 

[Tony Dyson]

I would guess there are other fuseboards in the car somewhere that would continue from 54?

 

[AndrewCS]

I would guess there are other fuseboards in the car somewhere that would continue from 54?

Well I have since gone through fuses and it seems fuse 28 & 31 and actually the headlight/s

Changing the fuse has not sorted the problem

Cheers

 

[mattkh]

Switch??

 

[AndrewCS]

Switch??

You mean the rotary headlight switch ?

I thought of that and my thoughts are that both headlights get supplied power from the same switch - the drivers side dipped beam is fine . Thanks for your input

 

[Tony Dyson]

So it sounds now like a job for your multimeter? I would now look for a healthy 12v and Ground reference at the lamp and work back from there.

 

[AndrewCS]

So it sounds now like a job for your multimeter? I would now look for a healthy 12v and Ground reference at the lamp and work back from there.

Thanks for that,


I think it would be best if I was to do that to use a circuit diagram ?


Looking for the next point in the line to test for 12v ?


I'm no expert


Wondering if a diagnostic will pick this up and / or give more info

 

[ZZZZ]

Fuse 55 is for cornering bi-xenon headlight option (614), so more often than not, you'd see this slot empty, in fact most of the time the entire 55-63 row is empty.

There's no secondary fuse bank in W169, like it was in W168.

For standard halogen headlights, the actuation is done by SAM (N10), via semiconductor switches, and it is most likely the relay responsible is faulty.

A reasonable quality scanner, like iCarsoft MB V.2 will provide more detailed information, yes.
I have one, if you're nearby

 

[Tony Dyson]

A wiring diagram would help or just follow the colour coded cores, the lights will be wired to the SAM as will the cores from the light sw as GLK has said, additionally and again as GLK has confirmed, a diagnostic scanner should be helpful.

 

[ZZZZ]

Here's part 3 of the SAM wiring diagram - it covers exterior lights, among other things.
Ignore the yellow highlights - I used this when working on my adaptive brake light gizmo.

 

[AndrewCS]

Fuse 55 is for cornering bi-xenon headlight option (614), so more often than not, you'd see this slot empty, in fact most of the time the entire 55-63 row is empty.

There's no secondary fuse bank in W169, like it was in W168.

For standard halogen headlights, the actuation is done by SAM (N10), via semiconductor switches, and it is most likely the relay responsible is faulty.

A reasonable quality scanner, like iCarsoft MB V.2 will provide more detailed information, yes.
I have one, if you're nearby

Thank you for your detailed input GLK,


As I am not familiar with many of these terms …


The N10 – is that the larger fuses on the left side of the fuse box?


The relays – they are positioned behind the footwall carpet passengers side?


I spoke to my mechanic (not a Merc specialist) and he says I can pop it over on Tues to do a diagnostic, I’m not sure which one has, I saw him use one hooked to a laptop and also he was changed brakes on the new A class and was telling me about releasing the callipers via the diagnostic unit (not the laptop one) so I imagine it’s a fairly comprehensive but can’t say the makes of either unit.


I was thinking yesterday to maybe go through each and every fuse in the fuse box with a test meter but got rained off the idea (I don’t have somewhere undercover to work).


Thanks again and for your offer


PS: I’m up in Scotland

 

[AndrewCS]

Here's part 3 of the SAM wiring diagram - it covers exterior lights, among other things.
Ignore the yellow highlights - I used this when working on my adaptive brake light gizmo.

thanks again for all your helpful input

 

[ZZZZ]

No worries, happy to help

N10 is Mercedes code for SAM - Signal Acquisition and Actuation Module - see the diagram, at the top it says N10 a few times.

The relays are next to the SAM, behind the carpet on the passenger side. Here's how to get to it - see attached (remember - the battery and main fuse box is on the same side in both RHD and LHD cars, but the SAM is on the left in RHD cars, so not next to the battery as shown in Mercedes workshop instructions).

The fuses in the main fusebox, next to the battery are unlikely to be responsible for this fault. I would start with wiring between the light and the SAM, and then check the relays, etc.

Here's the same diagram with a couple of notes - perhaps that'll make it easier to read:

Small digits are pin numbers; larger ones are plug/connector numbers; wire colours are pointed at, or underlined.

 

[AndrewCS]

Apologies its taken a while to give feedback.

My car was booked into the garage on the Tuesday.

When I drove in the owner took the bulb of the non working headlamp out - said the bulb has gone. Put a new bulb in and worked.

This has puzzled me as I when I put a brand new bulb in it didn't work, this was outside the motor factors shop. I took the bulb back asking if they could test it but said they would give me another bulb. That didn't work.

I was amazed and delighted when I saw it working and the garage didn't charge me.

One of these things I will never know the answer.

Thank you for all the effort and input offered . I do appreciate .
Slange
Andy