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Registered 2001 SLK230
Joined
6 Posts
Discussion Starter #1
Hello SLK Folks,
Our SLK230 R170 has developed an electrical problem if anyone is able to help steer me
in the right direction to solve this?
Exactly the same as described in the thread below, posted in 2011 but this didn't have any answers attached to it :(
The switch lights and windows roll down and then nothing, because no 24 fuse 40amp is blown, and dead short is
there because replacement fuse blew as well straight away.
Any help would be great, thank you

 

Premium Member 2002 R170 SLK V8 5.0
Joined
3,513 Posts
That sounds like your Pump has a dead short, un plug that at the pump and check that the Short at fuse is gone ;)

HTH
 
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Registered 2001 SLK230
Joined
6 Posts
Discussion Starter #3
Hi Dave I unplugged the relay, and the fuse still blows. Does that isolate the pump or do I need to unplug the
looms I can see next to the pump?
 

Premium Member 2005 SLK55 AMG; 2005 SLK350
Joined
5,223 Posts
Best I can tell, the pump motor is the only item on that fuse. If you removed the relay at the pump, then it seems you have a short to ground somewhere on the RED/YELLOW wire from Fuse 24 to the pump. There is an electrical connector at the pump, maybe disconnect that and check it.
 

Premium Member 2002 R170 SLK V8 5.0
Joined
3,513 Posts
Best I can tell, the pump motor is the only item on that fuse. If you removed the relay at the pump, then it seems you have a short to ground somewhere on the RED/YELLOW wire from Fuse 24 to the pump. There is an electrical connector at the pump, maybe disconnect that and check it.
+1

Exactly my thoughts ;)
 

Super Moderator UK 2002 SLK320 Blue
Joined
3,372 Posts
@savcom can you shed some of your elec insight on this for OP please?
Here goes ...

The Red/Yellow wire goes from the fuse to the relay contact via connector X1. Unplug X1. If the fuse still blows, I'd be looking for a chafed Red/Yellow cable that's rubbing the chassis somewhere. If the fuse doesn't blow, then it's very likely there's a short in the pump assembly.

Look for signs of burning or bare wire. Blowing a 40A fuse is likely to leave a trace.

584119
 

Registered 2001 SLK230
Joined
6 Posts
Discussion Starter #8
Thanks Savcom
Tried unplugging the connector and fuse still blows immediately !
My friendly MB specialist thinks it may be a problem in the V40 multi controller (under the hood next to the battery),
but from the wiring diagram the Red/Yellow feed runs direct to the multi plug X1, as you said.
I will start looking for broken insulation !
I will let you guys know when I get a fix.
 

Premium Member 2002 R170 SLK V8 5.0
Joined
3,513 Posts
Look at the Plug X1 end of wiring closely, I've known them get hot, and end up with insulation melting and the Brown Earth touching the +ve Red Yellow
 
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