Voltage Regulator or BCM ????
MBWorld Fanatic!
Joined: Nov 2009
Posts: 1,006
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e55
Im back from my diagnosis:
The blue wire that plugs into the alternator has no voltage with the key in position 2 - it should. He thinks it may be the BCM and doesnt have the tool to reprogram it, so Im off to the dealer tomorrow AM.
He pulled up several codes, one of which is "the supply voltage of the control unit is too low"
The blue wire that plugs into the alternator has no voltage with the key in position 2 - it should. He thinks it may be the BCM and doesnt have the tool to reprogram it, so Im off to the dealer tomorrow AM.
He pulled up several codes, one of which is "the supply voltage of the control unit is too low"
Newbie
Joined: Jul 2011
Posts: 6
Likes: 0
MB 2007 E350
Im back from my diagnosis:
The blue wire that plugs into the alternator has no voltage with the key in position 2 - it should. He thinks it may be the BCM and doesnt have the tool to reprogram it, so Im off to the dealer tomorrow AM.
He pulled up several codes, one of which is "the supply voltage of the control unit is too low"
The blue wire that plugs into the alternator has no voltage with the key in position 2 - it should. He thinks it may be the BCM and doesnt have the tool to reprogram it, so Im off to the dealer tomorrow AM.
He pulled up several codes, one of which is "the supply voltage of the control unit is too low"
Thanks
Super Member
Joined: Jan 2008
Posts: 626
Likes: 8
From: UK
E55K AMG
change the aux relay, its causing things to stay switched on like the AGW
