Austinsec

Still trying

Im at a loss I have a 2003 sl55 with a battery drain from 12.16v to 7.6 in 12 hours.
I have pulled fuses , put meter in line with batt to see the drain.
pulling fuses after with no result. I need more help. Im on Long Island. If anyone has some advise let me know, I have pulled the alarm, amp ,and cd fuses still no help. Bat is feb 2020 and charges to 12.6 last I checked. Anyone help please.
Alarm removed
radio android but removed fuse
cd fuse removed
amp removed fuse too
alarm fuse removed
replaced both batts and battery control module.
replace alt and regulator charges perfect
no lights on inside when car locked
Anyone help please.
Im on Long Island NY

Aussiesuede

Do you know if the Teleaid module was disconnected / removed when the Android stereo was installed? It was a known culprit of overnight battery drains once it starts malfunctioning. It would continouly attempt to make an emergency phone call to a now defunct analog system. It's located beneath one of the rear cubbies (can't remember if it's under the left or right side?). If it's still installed and connected,. You'll want to disconnect it.

pmercury

iTrader: (2)

you can remove the teleaid and voice control module also

here some diagrams taken from the Real EPC WIS, not the vintage "back in the past" version
hope it will help you

bobterry99

With these measurements you need to wait perhaps a few minutes after the key is removed, and I suppose you have been doing that.

If you've literally pulled every fuse, then I would remove the battery control module and check again. I read in your post that it is a replacement module, but it is the only component I can think of which is not fused. TELEAID is fused, and and it is powered from fuse #76 located in the rear fuse box.

If still no joy, then I suggest you review the power distribution diagram for the entire vehicle to ensure you covered everything. You can download a complete set of electrical drawings here. Power distribution is the very first diagram in the main index and is titled "Fuses".

As an aside, member AMG__POWER is looking for a battery control module, and it seems you have a spare...

Austinsec

Do I just remove the fuse for it?

Austinsec

It had the same issue with the old bcm too.
I just pulled every fuse from the front fuse box will check in a few hours
really at my wits end goes to 5v overnight awful

bobterry99

You can't, since it has no fuse. It's the only component I can think of which hasn't got a fuse.

Austinsec

That would imply that both bcms were bad , the first one burned out smelled and all this one is like new I doubt the battery control module is the issue.
I pulled all front fuses 2 hours so far still over 12v on batt will leave for 4 more hours and check

Frederick NL

(Judge me kindly)
If your prior BCM was toasted who knows what else went south. Nobody seems to have a clue what makes a BCM overheat, so likely there’s a potential problem within the module itself. Perhaps there’s a logic chain of components that are likely to suffer from excess current (ruling out permanent damage by under voltage/current, that is).

Austinsec

Looked like water got in, took care of that now

Frederick NL

Quite a few of them just scorched, occasionally starting a fire, without being flooded by an external leakage.

Austinsec

You are correct

Austinsec

Is this the correct setting to test?

grilzch

I've been having the same issue... Exactly. Also 03 sl55 with a android stereo, I did replace everything though when I installed the stereo, so replaced factory amp as well.
when in there I believe in disconnected the teleaid module, but am still having the drain.
Are you getting the error msg msg "SOS workshop"? That is the teleaid, my next step was to find someone with a star computer to remove the teleaid, I have seen the star path somewhere here to deactivate it....

Austinsec

I pulled the teleaid fuse , I was getting the error ., have star I may just try to disable.