Hello all! 2 dead batteries,help!
Thread Starter
Newbie
Joined: May 2018
Posts: 2
Likes: 0
From: San Jose,Ca
2006 W211
Hello all! 2 dead batteries,help!
dont know where to start.recently upgrade my sound system,and if the car sits for a day I have to jump it.Or it barely starts and says on the message says low battery,basic options something.It was all fine before I did the upgrade,had the battery (1st one) tested and it came out good,(oreily) alternator as well,wow what do I do?any suggestions?getting ready to downgrade
my sound system back.thank you!
my sound system back.thank you!
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
It is not much of upgrade if it is killing your battery 
You need to measure static draw on the car.
Hook up mulitmeter set to amp between the clamp and battery post and then pull the draw.
You should find a topic what acceptable draw is, but sounds like pulling fuse on your new radio would be good next step to measure the difference.
You need to measure static draw on the car.
Hook up mulitmeter set to amp between the clamp and battery post and then pull the draw.
You should find a topic what acceptable draw is, but sounds like pulling fuse on your new radio would be good next step to measure the difference.
