Batt5 circuit draining battery
Thread Starter
2nd Gear
Joined: Jun 2014
Posts: 2
Likes: 0
Batt5 circuit draining battery
I started having dead batteries on my 2012 GS after about 3 days of sitting. I checked current and it is 0.4A once everything powers down. I started pulling relays and fuses and found that pulling fuse 7 (BATT5) in the engine compartment fuse box dropped the current draw to 40mA. Without the fuse you cannot open the doors. Any idea why this may be occurring all the suddenly? Replaced battery with new and it ruined the battery after sitting for 1 week. Luckily Walmart replaced under warranty.
Burning Brakes
Joined: Jan 2005
Posts: 1,216
Likes: 1
From: westminster California
I started having dead batteries on my 2012 GS after about 3 days of sitting. I checked current and it is 0.4A once everything powers down. I started pulling relays and fuses and found that pulling fuse 7 (BATT5) in the engine compartment fuse box dropped the current draw to 40mA. Without the fuse you cannot open the doors. Any idea why this may be occurring all the suddenly? Replaced battery with new and it ruined the battery after sitting for 1 week. Luckily Walmart replaced under warranty.
Thread Starter
2nd Gear
Joined: Jun 2014
Posts: 2
Likes: 0
You will have to check current draw of each circuit connected to fuse 7 to see which one is drawing excessive current. You can put your ammeter in series with each one and then connect to the plus side of the battery to find out which circuit it is with fuse 7 pulled out or disconnected of course.
Race Director
Joined: Oct 2007
Posts: 11,367
Likes: 211
From: Edgewood Washington
St. Jude Donor '11-'12-'13-'14-'15
The RCDLR may be defective. This is always on but draws minimal current at rest, if operating correctly.
This is not unheard of. Are you having any issues or seeing any DIC messages when the battery is fully charged?
This is not unheard of. Are you having any issues or seeing any DIC messages when the battery is fully charged?
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
They will find it quicker than you can and you don't have to deposit any blood on sharp edges. One thing you could check is to see if your power seat switch is sticking on. They can rub against the bezel and not always return to the center off position.
Bill
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,151
From: SW Florida
2021 C6 of the Year Finalist - Modified
I am having the exact same problem with my 2011 GS
I installed brand new battery that was fully charged. After setting for 2 days, the battery is dead. I then fully charged it and hooked up my multimeter and found I have a .463 amp draw from the battery all the time the car is shut down with no lights on.
I pulled the #7 fuse (BATT5) and the electrical load went down to .007 amps.
I hope the OP reads this and can tell me what he finally found out was causing his problem.
I installed brand new battery that was fully charged. After setting for 2 days, the battery is dead. I then fully charged it and hooked up my multimeter and found I have a .463 amp draw from the battery all the time the car is shut down with no lights on.
I pulled the #7 fuse (BATT5) and the electrical load went down to .007 amps.
I hope the OP reads this and can tell me what he finally found out was causing his problem.
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