Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

The connection is good.

So the water pump comes on when the engine idles?

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

Back side of the controller unit

http://imagizer.imageshack.us/v2/150...921/Vgr5y9.jpg

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

Yes , exactly ...

The pump comes on when the engine idles.

The pump works with a big noise ( as in the video that i sent you yesterday )

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

OK, let me try to solve this problem. Need your help.

Can you unplug the grey harness, tell me if the pump stops.

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

I've unplugged the grey harness , the pump stopped but the system is off , too. There is no lamp on the controller unit and on the gauge.

Have I unpluged the right harness , see the photo please ?

http://imagizer.imageshack.us/v2/150...922/KTZIKN.jpg

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

This is good so far..

Tell me what wires are used on the grey connector and where are they connected to.

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

We are only using the red wire on the grey connector as in the G63 's wiring diagram , if you see the wiring you will understand where is the red wire is connected.

http://imageshack.com/a/img924/7393/UXYBy6.gif

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

OK, so only the red wire is connected.

Can you out the grey harness back on and pull out the green harness, let me know if the pump stops.
Can you see any led on the circuit board lights up with and without the green harness plugged in.

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

When we pulled out the green harness , the pump working again.

When the green harness is plugged , there is a lamp lighting on the circuit ,
I recorded a video , you can see the lighting lamp.

http://youtu.be/91FcbH1JPvc

When the green harness is unplugged , there is no lamp lighting but the pump still comes on.

Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
 

You wrote:
"When we pulled out the green harness , the pump working again."

What does this mean?