Help please,HFS 4 V3 wiring diagram for E63 AMG

[Richard L]

OK... we are getting closer

unplug the blue harness, does the pump stop?






can you unplug the blue ocmmen

[Maktech]

Originally Posted by Richard L

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

What does this mean?

When the green harness is disconnected , the pump comes on , there is no change ... I mean , we have the same result with and without the green harness.

[Maktech]

Originally Posted by Richard L

OK... we are getting closer

unplug the blue harness, does the pump stop?

can you unplug the blue ocmmen

I unplugged the blue harness , the pump stops.

I don't know what "ocmmen" is

[Richard L]

OK, we have tracked down the area that caused the pump to continue pumping.

Do you have a digital voltmeter? The next test will require it. Please let me know.


Where did you see the word "ocmmen"?

[Maktech]

Yes , we have a digital voltmeter

[Richard L]

This is good.

Please measure the resistance between the red and blue wire of the RJ connector side of the blue harness.

Also tell me the order of the wire colour in the RJ connector.

[Maktech]

Sorry ,

I couldn't find the wires that you told me ;
Actually , I don't know what RJ connector is ��
Could you describe me or please send a photo or scheme

[Richard L]

When you unplug the blue harness from the controller, the plug is called RJ connector. There are four gold slots. YOu should see the wire colour behind it.

Meanwhile, can you give me some history of the system. Was it installed on other vehicles before? I can see there is some unsuitable colder link on the underside of the circuit board.

[Richard L]

This is a RJ connector, see the gold fingers between the plastic compartments?

[Maktech]

The result is .080

I bought it from my friend , he said that the system is brand new.