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  #21  
Old 16-03-2016, 12:16 PM
Richard L Richard L is offline
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Default 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?
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  #22  
Old 16-03-2016, 12:34 PM
Maktech Maktech is offline
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Default Re: Help please,HFS 4 V3 wiring diagram for E63 AMG

Back side of the controller unit

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  #23  
Old 16-03-2016, 12:36 PM
Maktech Maktech is offline
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Default Re: Help please,HFS 4 V3 wiring diagram for E63 AMG

Quote:
Originally Posted by Richard L View Post
The connection is good.

So the water pump comes on when the engine idles?
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 )
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  #24  
Old 16-03-2016, 12:54 PM
Richard L Richard L is offline
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Default 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.
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  #25  
Old 16-03-2016, 01:13 PM
Maktech Maktech is offline
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Default 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 ?

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  #26  
Old 16-03-2016, 01:31 PM
Richard L Richard L is offline
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Default 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.
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  #27  
Old 16-03-2016, 01:42 PM
Maktech Maktech is offline
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Default 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.

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  #28  
Old 16-03-2016, 03:51 PM
Richard L Richard L is offline
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Default 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.
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  #29  
Old 16-03-2016, 04:03 PM
Maktech Maktech is offline
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Default 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.
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  #30  
Old 16-03-2016, 05:31 PM
Richard L Richard L is offline
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Default 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?
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