Battery Drain Fuse 20 (see post below): Is It the CCM??
Have parasitic current drain (.18a) when all is off and key out -- which had contributed to a flat battery. The drainm seems to be on Fuse 20 circuits which include the CCM and OBC and Gong (and A/c and Central locking etc etc).
When I take out CCM, the drain reduces to a normal level (.03a). Could a CCM draw that much current...when 'ide;' ie no messages appearing on OBC? Or is it inciting the OBC to do something else and its that that causes the drain?
I had thought the problem to be the GONG, at first, because when searching for the cause I could detect a very faint crackling-type noise from the gong. However isolating/disconnecting this completely didnt cause the parasitic drain to decrease more than about .01, maybe .02 amps.
Does this mean the OBC's 'bad'? Do others who have had incorrect messages from the OBC also show a high parasitic drain? I do get a rogue License plate light message from time to time...
David in the UK
86 316a 7336664
92 525iXaT GD79080
99 Z3 2.8a LC67252