Go Back  G35Driver - Infiniti G35 & G37 Forum Discussion > Tech Area - V35 > Audio, Video & Electronics
Reload this Page >

Parasitic Draw is draining my battery. I found the circut, now what?

Audio, Video & Electronics Post questions, reviews, and other general info about the G's Nav, sound system, or satellite radio

Parasitic Draw is draining my battery. I found the circut, now what?

  #46  
Old 07-29-2013, 06:21 PM
DGrantG's Avatar
Registered User
Join Date: Aug 2009
Location: Murfreesboro, TN
Posts: 705
Received 25 Likes on 21 Posts
No idea. It's a Bose in an 06 coupe.
 
  #47  
Old 07-30-2013, 11:58 AM
Registered User
Join Date: Sep 2012
Posts: 14
Likes: 0
Received 8 Likes on 3 Posts
Making some progress on my end: Got a new battery, pulled the Radio 15A fuse, and am shunting across that with a digital meter, here's my findings:

Normal power-on running current is ~2.5A, with radio or CD playing. When I turn off the radio, it "usually" falls to about 0.015A (15mA). However, about every 2-3 power cycles, it stays at about 0.850A, as others have seen too. I have yet to find a 100% repeatable pattern to when it does or does not "hang" at the higher current draw. It seems to me that pulling 0.850A would certainly drain the battery in a matter of a day or two at the most, while 0.015A is a totally acceptable standby power draw state, and would last months.

With that, has anyone else concluded these findings, and found a resolution? I do not want to wire in a power-off relay, since that will kill the radio presets every time. I am, however, open to the idea of disconnecting the CD player, as I had done for quite some time anyway. I use a GROM bluetooth adapter on the SAT channel, so my phone and radio are basically the only inputs I ever use (Yes I did confirm that removing the GROM unit has no play in when the parasitic power draw scenario pops up).

Hope this helps... let's keep moving on fixing this issue guys!

Also one other thing, if there's someone out there that does NOT have the power drain issue, if they could test the power on/power off current draw of their Bose, that would be very helpful too
 
  #48  
Old 07-30-2013, 12:45 PM
Registered User
iTrader: (1)
Join Date: Mar 2013
Posts: 53
Received 5 Likes on 3 Posts
Originally Posted by jbishop129 View Post
Making some progress on my end: Got a new battery, pulled the Radio 15A fuse, and am shunting across that with a digital meter, here's my findings:

Normal power-on running current is ~2.5A, with radio or CD playing. When I turn off the radio, it "usually" falls to about 0.015A (15mA). However, about every 2-3 power cycles, it stays at about 0.850A, as others have seen too. I have yet to find a 100% repeatable pattern to when it does or does not "hang" at the higher current draw. It seems to me that pulling 0.850A would certainly drain the battery in a matter of a day or two at the most, while 0.015A is a totally acceptable standby power draw state, and would last months.

With that, has anyone else concluded these findings, and found a resolution? I do not want to wire in a power-off relay, since that will kill the radio presets every time. I am, however, open to the idea of disconnecting the CD player, as I had done for quite some time anyway. I use a GROM bluetooth adapter on the SAT channel, so my phone and radio are basically the only inputs I ever use (Yes I did confirm that removing the GROM unit has no play in when the parasitic power draw scenario pops up).

Hope this helps... let's keep moving on fixing this issue guys!

Also one other thing, if there's someone out there that does NOT have the power drain issue, if they could test the power on/power off current draw of their Bose, that would be very helpful too
Yeah my parasitic draw is gone after replacing the resistors with the design shown in my video posted earlier in this thread.

You may already be doing this but I noticed that the Bose has a settling/init time. After you supply power to it wait ~1min before reading the DMM. Did you do that during your measurements ?
 
  #49  
Old 07-30-2013, 12:59 PM
Registered User
Join Date: Sep 2012
Posts: 14
Likes: 0
Received 8 Likes on 3 Posts
@Quanttrom, I'm glad to hear that! I am sort of posting my results in real-time here as a test today. Since I have my meter shunted in so I can see the display from inside the car, I'm able to leave it and read the results as they are happening.

This last round of testing, I found that it took about a dozen ignition key cycles to finally get it to "stick" at the 850mA draw. I left it, and came back about 10 min later and found it had dropped to the desired 15mA or so.

@Quanttrom, I'm not sure what you mean by "Reading the DMM"?

I replaced the 15A fuse, and am just reading the battery voltage now and recording it every 15 min, so I can see if I get any significant draw-down over time. It will take a few days or weeks to be sure, but I am starting to lean more towards my root problem actually having been a failed battery (due to me draining it way down), it was a 5 year old battery anyway.
 
  #50  
Old 07-30-2013, 01:06 PM
Registered User
iTrader: (1)
Join Date: Mar 2013
Posts: 53
Received 5 Likes on 3 Posts
Originally Posted by jbishop129 View Post
@Quanttrom, I'm not sure what you mean by "Reading the DMM"?
Just recording the measurement. The measurement is valid only once the stereo has had enough time to go through it's init procedure and settle fully. ~1min is safe.
 
  #51  
Old 08-01-2013, 12:11 PM
Registered User
Join Date: Sep 2012
Posts: 14
Likes: 0
Received 8 Likes on 3 Posts
I can say with more confidence now, having replaced my battery Monday, that I was actually not experiencing the parasitic power draw from the radio. It was coincidence with a 5 year old battery being drained down too low, when I was working on the stereo last week. I have not made any further changes, and the battery has not gone low, and the Bose stereo is still working normally. I agree with others, that the replacement or re-soldering (re-flowing is not enough, add solder!) of the resistors is the key fix for the Bose radios, and in turn keeping the radio from drawing down the battery by not properly turning itself off.
 
  #52  
Old 08-01-2013, 12:34 PM
DGrantG's Avatar
Registered User
Join Date: Aug 2009
Location: Murfreesboro, TN
Posts: 705
Received 25 Likes on 21 Posts
Can someone pull they headunit and take a picture of the back with arrows showing which resistors need more solder?
 
  #53  
Old 08-01-2013, 12:49 PM
Registered User
Join Date: Sep 2012
Posts: 14
Likes: 0
Received 8 Likes on 3 Posts
I took this picture when I re-soldered mine. You can see (sorry its a bit blurry) that the resistors are loose and out of whack. When you look at yours, they may not be visibly lifted or out of place, but it's highly likely they are hairline fractured. I would recommend (only if you are confident in your soldering skills) to hit each of these resistors and add fresh solder to the joint as well.

Since I was already in there, I went over the whole board and hit any resistor of that same size, to play it safe as well. There are about a billion much smaller resistors, and I didn't mess with those, just the larger ones like pictured here.

Also for reference, we've been discussing this in the following thread:
https://g35driver.com/forums/audio-v...check-out.html

 
The following users liked this post:
Wrathernaut (08-01-2013)
  #54  
Old 10-28-2018, 10:13 AM
Registered User
Join Date: Oct 2018
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
Silver G35
Parasitic Draw

My 2005 G35 Sedan had a draw that was killing the battery after a couple days of not starting the vehicle. It was coming from the radio and with this stock bose system I decided to upgrade the head unit and now I am getting a .35 amp pull. From what I read this is acceptable, but I am still concerned of the dead battery. Thoughts????

David
 
  #55  
Old 10-28-2018, 01:00 PM
cswlightning's Avatar
Registered User
Join Date: Jul 2017
Location: Southern Maine
Posts: 913
Received 96 Likes on 89 Posts
See how long it takes to drain your battery and then you'll know how acceptable it is. Mine drains in about a week and a half so if I know it's going to be sitting longer than that I just pull the negative terminal.
 
  #56  
Old 10-28-2018, 03:22 PM
Registered User
iTrader: (1)
Join Date: Mar 2013
Posts: 53
Received 5 Likes on 3 Posts
Originally Posted by djrines1 View Post
My 2005 G35 Sedan had a draw that was killing the battery after a couple days of not starting the vehicle. It was coming from the radio and with this stock bose system I decided to upgrade the head unit and now I am getting a .35 amp pull. From what I read this is acceptable, but I am still concerned of the dead battery. Thoughts????

David
0.35A seems high
I sold the G35 a while back so I can't measure anything but I think the car should be able to sit for 2 weeks without too much trouble.
 
  #57  
Old 10-28-2018, 06:28 PM
Registered User
Join Date: Sep 2010
Location: Dayton, Ohio
Posts: 168
Likes: 0
Received 3 Likes on 3 Posts
Originally Posted by djrines1 View Post
My 2005 G35 Sedan had a draw that was killing the battery after a couple days of not starting the vehicle. It was coming from the radio and with this stock bose system I decided to upgrade the head unit and now I am getting a .35 amp pull. From what I read this is acceptable, but I am still concerned of the dead battery. Thoughts????

David
350mA is too high. General rule of thumb is no more than 50mA 20 minutes after the car is left (make sure you give the BCM enough time to enter sleep mode).

A standard automotive relay pulls about 200mA and when people wire them to stay energized with the car off they generally kill the car within 3 days.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bryanr
Drivetrain
15
09-30-2015 06:31 AM
TeamNoSleep
G35 Sedan V35 2003-06
3
09-13-2015 07:40 PM
AuAltima3.5
Cooling
0
09-13-2015 10:46 AM
johnadlertech
Engine - Complete Motors
2
09-06-2015 12:45 PM
G35CO
G35 Sedan V35 2003-06
0
09-04-2015 09:27 AM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Parasitic Draw is draining my battery. I found the circut, now what?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: