Need Advice on draining battery

[dvrmstrng 5,000+ posts]

Setup is

7200MKII

eD nine.5

pretty straight forward, a few months back my battery died when it started getting very cold (thought it was weather related). After a charge and me pulling out the amp and head unit the battery was back to normal. It is finally warm out today and I thought I would diagnose the problem. Where would i start to find out what might be pulling some voltage when the car is completely off. I have a digital and analog DMM. I am guessing that the headunit (dead head) can't even pull power with the car off.

I guess the first step would be to hook the nine.5 back up and check to see if there is any voltage at the remote wire hookup with the car off?

thanks for any help guys.

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[R34P3R 10+ year member]

I had a wire short in my passenger side window on my Eclipse that would drain the battery. What a pain in the ass. Finally ended up disconnecting the assembly instead of rewiring the whole passenger side. Hope your's isn't as severe. Could just be cold weather with a dated battery. Age and Make/Model of the bat?

 

[dvrmstrng 5,000+ posts]

The battery was brand new as of last year...i believe its a interstate...i didnt feel the need for a yellow or red top considering the entire setup is less than 600 watts and is rarely used. Maybe it was just the weather? The system has been in for 3+ years and this only seems to happen in the cold.

 

[dvrmstrng 5,000+ posts]

bump for ideas

 

[audioatg 10+ year member]

Could be just the cold weather and the battery might be bad. I know you said you got it last year. But you never know it still could be bad. Now you have a DMM does it have Amps and milli amps on it. If so set it to amps. Leave the DMM off for now. Disconnect the negative side battery terminal. Put one lead of the DMM on the negative terminal and the other side on the negative battery terminal. Now turn on the DMM. Check out how many amps it reads. Most vehicles you want I think its less the .05 amps. Just read what it says. The DMM is in series.

 

[dvrmstrng 5,000+ posts]

ill give that a check tomorrow and report back

 

[dvrmstrng 5,000+ posts]

Did what you said....and it read 0.00 no matter what...system is back together and i guess ill keep an eye on the battery.

 

[audioatg 10+ year member]

Did what you said....and it read 0.00 no matter what...system is back together and i guess ill keep an eye on the battery.

Sounds odd. Should have some type of draw. Might have to check your fuses in your DMM. get another DMM set it to ohms and check the fuses. Just to be sure. Might be the reason you are getting a zero reading.