[IceGoaliePaul]

I had parasitic draw that was draining the battery in 2 days. Turned out to be the bose amp not going to sleep all the time. You could hear it still hissing slightly if you listened at the soeakers after waiting 5 mins for the car to go to sleep. It didn't fo it every time sometimes it slept properly. GM replaced the amp under warrenty.

[arpad_m]

I'd also be interested to see if anyone has a more tractable testing process than the only one I can think of, hooking up a multimeter and pulling fuses one by one to see what happens in the car 5-10 minutes after shutdown. Neither the hood nor the trunk lid should prevent the systems from going into full sleep.

[Gunkk]

Originally Posted by arpad_m

I'd also be interested to see if anyone has a more tractable testing process than the only one I can think of, hooking up a multimeter and pulling fuses one by one to see what happens in the car 5-10 minutes after shutdown. Neither the hood nor the trunk lid should prevent the systems from going into full sleep.

No need to pull fuses. You can directly determine the mA drain with your multimeter by measuring voltage drop across the fuses in the engine bay (with hood open). The car will go completely to sleep with the hood open. Trunk must be closed or you'll see the drain from the trunk compartment light.

[LtColumbo]

That info and chart looks very useful. Thanks.

[arpad_m]

Ditto, thank you very much, Gunkk

[JSH]

Mine started the same thing so I leave on 1.5a trickle

Originally Posted by 17rsvert

Went away for a one week vacation and left the car (2017 3.6 V6 4500 mi) In the garage. Returned to a dead battery, measured at 4.3 V with a multimeter. Would not accept a charge from my Schumacher smart charger; kept displaying "bad" on the digital display. After 3 attempts, I set the charger to "engine start" mode for about 45 minutes, and that gave it enough charge that the charger was able to go through its full automated charge cycle.

I had a service appointment a few days later at the dealer for an unrelated issue, and asked them to check the battery and charging system. Results: battery OK, charging system OK, parasitic draw at rest measured 0.20 millivolts. The tech told me anything under 0.25 is acceptable.

I had installed extra LED lights on the inside of the trunk lid and he thought that might be the problem. The draw measured the same with them connected and disconnected, so that was not the issue. He told me I would need to leave the car there for at least 2 days so he could troubleshoot over a long time span with a recording meter. Not ready to do that yet while the weather is nice.

My one thought is that I had connected the Infotainment system to my home WI FI just to check it out, and never disabled it. Could it be possible that the WI FI could be intermitently waking up the computer causing a larger than at-rest draw? The tech did not know if that could be an issue or not.

Anyone with a similar issue figure what would cause this mystery drain?

[JSH]

Well, since we know that software updates can continue for, I believe, 30 min after the power is turned off, it makes sense that such activity consumes a bit of power.

[LtColumbo]

Originally Posted by JSH

Mine started the same thing so I leave on 1.5v trickle

1.5v or 1.5a?

[LtColumbo]

Just for clarity, using a multi-meter set to DCV, negative lead on ground and positive lead on a particular fuse, the meter should read according to the chart? I'm wondering what 179mA DRAW will look like in mV?

[JSH]

Originally Posted by LtColumbo

1.5v or 1.5a?

amps

[LtColumbo]

I'm still stuck. Range disconnected. Got 178-183mA draw with only the trunk open (light disconnected.) The draw changes from 178 to 183 about every second. Seems like some device is "searching" for something. I got in contact with a dealership to try to get a "spec" on "normal parasitic draw" but was unable to get an answer.

[2018blackss1le]

Someone has mentioned this before and it sounds ridiculous, but shut the wifi off in the radio settings. My car would randomly go into key learn mode, a no start situation yet the key fob worked fine to lock/ unlock/ trunk pop/ panic, even putting the key fob in the rear cup holder did nothing. Holding the start/stop button for 12 seconds took it out of the learn mode and the car started every time. 2 dealer visits with not much help, they disconnected my wireless charger, came home, the next day the car is in key learn mode. It has been over a week with wifi shut off and I have absolutely no issues. A day before I shut off the wifi I went out at night after a no start issue to see the backlight of the radio on and the power button ring lit up for well over 5 mins. There is some kind of wifi connection issue.