375 [340] aft EIM explanation

[fat spider]

I live in Australia and have a 375 sundancer [US 340 ] V drive with 6.2 petrols.
The starboard battery bank is continually draining when the battery solenoid is turned off I understand the bilge pumps are connected all the time but they run rarely and are surely not the problem. The only other thing that I can find that is connected even though the battery solenoid are in the off position is the aft EIM, I have scrolled through the wiring diagrams but have not come up with an answer.
I do not have shore power only solar. I have previously been under the impression that the Galvanic Isolator was continually drawing current but after studying the wiring diagrams I am unsure that is correct.
What I need to know is what might be consuming power through the Aft EIM.
I would appreciate any info, many thanks

 

[Bt Doctur]

you could disconnect the main 12v feed to the EIM for testing, Do you have power to the module with the battery switch off.

 

[Bt Doctur]

Heres the manual for it http://rnr-marine.com/images/Sea-Ray_340-Sundancer_2005_Owners-Manual.PDF

 

[fat spider]

you could disconnect the main 12v feed to the EIM for testing, Do you have power to the module with the battery switch off.

yes there is always power to the aft EIM which is unswitchable but the sea ray manual doesn't really clarify what is sourcing power from the aft EIM or maybe it's hidden that deep in the info I just can't see it.