Originally Posted by methodsound' post='1047705' date='Nov 5 2009, 01:47 AM

I use the adaptor so I do not have to worry about the fuse in the DMM. Either way, an acceptable draw would be around 40 milli amps.


Is your car able to go to sleep? It should sleep after about 16-26 minutes with all triggers closed and no activity.

Originally Posted by skibarefoot' post='1047710' date='Nov 5 2009, 09:58 AM

How do I know the car went to sleep?

Originally Posted by LStone' post='1047724' date='Nov 5 2009, 02:25 AM

If you have auto gearbox, the light that indicates the gear stays on until the car goes into sleep mode.
I had similar problems with my battery dying overnight and the problem seemed to be the Micro Power Module
(MPM) which was replaced a couple of months ago. That?s the module that controls the sleep mode.
That battery hasn?t died since.
Hope this helps.

Originally Posted by skibarefoot' post='1047539' date='Nov 5 2009, 12:37 AM

The battery on my 545 is dead overnight. It is driven more then enough everyday to keep the battery charged. I even charged the battery and reinstalled it same thing battery dead next morning. What should normal amperage be for this car when it is sleeping? When I first read the amperage it is around 5 amps. All the trunk lights and interior lights are off. Then after a couple hours it drops to 3. I checked voltage across all the fuses in the trunk and glovebox. No voltage drops found. I then pulled each fuse looking for a drop in the ammeter reading. I found when pulling the ignition fuses in the glove box number ignition fuse 7 and 15 and the radio fuse 34 the ammeter drops to .84-1.4 amps. All three fuses need to be pulled to get the amps to drop. I left the fuses out and reconnected the battery to see if the voltage drops overnight again.

This morning the battery was dead. There where a couple other fuse that when pulled resulted in a very slight amp draw change.

Anyone know where to go next? Anywhere I can get wiring prints and manuals for the car?

Thanks.

Craig

Originally Posted by skibarefoot' post='1047539' date='Nov 4 2009, 11:37 PM

The battery on my 545 is dead overnight. It is driven more then enough everyday to keep the battery charged. I even charged the battery and reinstalled it same thing battery dead next morning. What should normal amperage be for this car when it is sleeping? When I first read the amperage it is around 5 amps. All the trunk lights and interior lights are off. Then after a couple hours it drops to 3. I checked voltage across all the fuses in the trunk and glovebox. No voltage drops found. I then pulled each fuse looking for a drop in the ammeter reading. I found when pulling the ignition fuses in the glove box number ignition fuse 7 and 15 and the radio fuse 34 the ammeter drops to .84-1.4 amps. All three fuses need to be pulled to get the amps to drop. I left the fuses out and reconnected the battery to see if the voltage drops overnight again.

This morning the battery was dead. There where a couple other fuse that when pulled resulted in a very slight amp draw change.

Anyone know where to go next? Anywhere I can get wiring prints and manuals for the car?

Thanks.

Craig

Originally Posted by higher' post='1047818' date='Nov 5 2009, 08:17 AM

It could be a sticky control switch, possibly the heated rear screen.

Cetainly something big that is drawing lots of current. The switch will look like it is off (ie; the ligth will go out etc) but it will be stuck on.

Some GM cars are famous for this sticky switch problem. Very difficult to diagnose / fix unless you are familiar with the problem, because all the switches look like they are off until you test every one of them individually by pulling it and getting a meter on it.

Also, caused by spillages of water, stickly drinks etc over switches, which again causes them to stick. Has anything been spilled over your window switiches for example ?

Hope this helps.

Originally Posted by sixcard' post='1047829' date='Nov 5 2009, 08:46 AM

So far we have seen four copies of the original post. Somehow they are all alike.

sixcard

Originally Posted by sixcard' post='1047923' date='Nov 5 2009, 10:49 AM

My reference was to copies of your original post made on other members' replys to your original post. They are rendundant. And they are annoying, at least, to me.

skibarefoot, I recognize, and welcome, your newness to the Forum and my comment was not directed to you.

sixcard