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Ricky, X5SND, & TerminatorX5 - I appreciate yours posts:
1. X5SND - I look forward to your pick of the location where you found the male connector harness that goes with the level sensor (attached). Please let me know if you can identify the color(s) of the powered line, I can't find a line reference in the Bentley manual.
2. TerminatorX5 - Good info and thanks for sharing. Yes, it is an old thread . . . but no reason to make a new one if we're still developing the titled issue on our E53s. There hasn't been a wire to this level sensor (pic attached) since I bought the truck in 2009. You say that "if the line is "grounded", there is enough coolant, if the line is "broken", there is insufficient coolant level..." . . . well, the level sensor shown is definitely NOT providing a ground to anything without a wire attached to it (thus broken) . . . and I have NO advisory light. When I turn on the ignition switch, there is no coolant level advisory light test. My OM does NOT reference an advisory for low coolant level.
I'm going to wait for X5SND's wire location and color reference, and then try to match that up with your LCM references.
TerminatorX5 - Did you find a reference to a coolant level sensor circuit in the Bentley manual, or elsewhere?
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