Yeah, using a bm2 monitor on it, so I can track the voltage over time, and measure it without waking the car...but it doesn't measure current, which would be super useful!

Please note - I am not a mechanic or expert in anything.

 

Ah, yes, I've got another fail, not doing too well.  The others system would be more expensive, perhaps something s/h from the leisure side more than car side.

 

Remaining off target, I wonder if intermittent whether it might be water or damp related if the drain is when the car is not used, or chaffed.  I remember seeing a video of some electric-tech looking for a drain on a modern VW bug that others could find and he found a few drains but could get below the mA of normally forget about it and had to leave it just above the threshold as he'd already spent so long on it, just shows how much searching these things can sometimes take.

 

I remember yo putting about a single wire from the battery so expect you've remove any other PO stuff already that you've found.

 

Be interesting to  know what you find as the source(s), good luck.