Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
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.
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Richard L
aquamist technical support
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