L322 no illumination on instrument cluster

Hi all,

I have a 2007 L322 3.6 TDV8 and I have no illumination on the instrument cluster and heater control panel when I turn the headlights on.

On the instrument cluster the rev counter and speedo still work, all the tell-tale lights still work, and the info panel at the bottom still works and is illuminated.

On the heater panel, like above, all the orange tell-tale lights work and the controls work.

My issue I related only to the back illumination when you turn the headlights on.

I scanned the car and the only error I’m getting is in the Instrument Cluster module and it’s: B102F auxiliary switch.

I’ve replaced the physical headlight switch in the dash as I did wonder if it had something to do with the dimmer, but the brand new replacement has made no difference.

Any help with this is much appreciated.

I take it you have checked for fuses?

J

Yep, checked fueses F1, F45, F46, which all relate to the instrument panel. Any others I should check?

Do you have back light in the airvent left/right door handles and gear stick area

I am looking at my 2011 wiring dia but dont want to post/confuse if its different, I can look later see what I have for 2007.


J

Found this for 2005 may help,

J

Nope, I have none of those.

I’ve just discovered that O/S rear passenger window switch is broken - could this have anything to do with it?

Is the dimmer switch for the headlights connected or working. Is there any voltage to it or from it?

The background illumination all appears to be through fuse 51

TrustyBib said:

I’ve just discovered that O/S rear passenger window switch is broken - could this have anything to do with it?

Click to expand...

If that's shorted out the illumination and took out the 5A fuse, yes.

Graculus said:

The background illumination all appears to be through fuse 51

Click to expand...

And all through 1 earth point it seems. Do you know where that is?

J

I've a ground point location schematic somewhere, it'd be quicker to look at the electrical library for the connector reference which will show the location, I've a feeling it's at the bottom of one of the 'A' pillars but not 100%

It seems you lot are on youtube....



(Click on watch on youtube)

The fuse was indeed blown. Going to test a replacement window switch and if that’s the source of the problem will update the thread fully with the end result. Thanks for your help so far.

TrustyBib said:

Hi all,

I have a 2007 L322 3.6 TDV8 and I have no illumination on the instrument cluster and heater control panel when I turn the headlights on.

On the instrument cluster the rev counter and speedo still work, all the tell-tale lights still work, and the info panel at the bottom still works and is illuminated.

On the heater panel, like above, all the orange tell-tale lights work and the controls work.

My issue I related only to the back illumination when you turn the headlights on.

I scanned the car and the only error I’m getting is in the Instrument Cluster module and it’s: B102F auxiliary switch.

I’ve replaced the physical headlight switch in the dash as I did wonder if it had something to do with the dimmer, but the brand new replacement has made no difference.

Any help with this is much appreciated.

Click to expand...

hi

wished to say a massive thks and enjoying ur videos , great job with the panel spraying

also so pleased u got the illumination sorted out , have also subscribed to ur channel