Re: Help please,HFS 4 V3 wiring diagram for E63 AMG
This is good news, the blue harness is in perfect health.
I like you you do some tests on the controller.
There are two rows of 15 test points. Systen ground is on the bottom left of the test points. This is where the black probe of your meter should go.
With the system at "per-crank" key position, please measure the voltage at:
TP4
TP5
TP8
TP11
TP15
TP16
TP17
TP18
TP20
TP23
TP30
You can use the 20V DC range.
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Richard L
aquamist technical support
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