Fuse 38 Blown, fan stopped working

May 17, 2023
2
0
Hi.
I bought a 2009 6J 1.6 16v last week. The A/C fan was working fine for about 30 minutes of use. But there was a moment when I accelerated a little more harshly at a green light and I heard a fuse blow, and the A/C fan stopped working.
Upon inspecting the fuse box, I found that Fuse 38 15A - Start power supply disconnection - was the one blown. And it wasn't just blown, it was almost melted. I changed the fuse, tested it for a brief moment and now the fan works.
What does Start power supply disconnection mean? How is it connected to the blower fan? Why did it blow while accelerating? Any help would be appreciated.
 
May 17, 2023
2
0
I think I found the source of the problem.
According to cardiagn.com there were different layouts for the fuse box depending on when the car was built.

from February 2008
from November 2008
from January 2009
from May 2009
from November 2009
from June 2010
from November 2010
from June 2011
from November 2011
from June 2012
from November 2013

That's 11 versions!

My car was first registered in January 2009.
That includes 3 fuse box layouts, but after some testing I narrowed it down, my car was built between November 2008 - January 2009.

From February 2008 up until November 2008, fuse 38 (15A) was for:
-Heated driver seat switch
-Heated front passenger seat switch
-Heated front seats control unit

The service manual that came with the car states that fuse 38 - Start power supply disconnection- should be a 15A fuse.

Then from November 2008 the fuse layout changes, and fuse 38 (30A) is for:
-Fresh air blower switch
-Fresh air blower control unit

That is double the amps, that is why my fuse was blown (I think)
I changed some more fuses based on the new fuse box layout, and there were several fuses that were either bigger or smaller than they should have been.

However my problems are not solved yet. The new fuse box layout says that fuse 14-15-16 should be vacant. After pulling them out, my factory xenon headlight's leveling function stopped working so I put them back.

So I tought maybe one of the previous owners retrofitted a factory xenon headlight and that's why 14-15-16 controls the leveling function. But then I opened the service manual that came with the car and 14-15-16 is for AFS headlights.
I'm like what the hell is going on?? Neither the factory service manual or the cardiagn.com wiring diagram matches my car's fuse box.

tl;dr
My car's fuse box is only partially identical to the service manual that came with the car, there are major differences between it and the wiring diagram that I found on cardiagn.com (11 different versions of fuse box layouts according to it)

Will update in the future...
 
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