Battery Drain - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 5Likes
  • 2 Post By dhutton
  • 1 Post By akxtreme
  • 2 Post By Everett#2390
 
LinkBack Thread Tools Display Modes
post #1 of 12 (permalink) Old Jul 22nd, 19, 05:30 AM Thread Starter
Senior Tech
Bruce
 
Join Date: Mar 2008
Location: Waxhaw, NC
Posts: 2,504
Battery Drain

Battery drains overnight. How to determine where the drain is coming from. Best way to test and locate the drain?
The Camaro Guy is offline  
Sponsored Links
Advertisement
 
post #2 of 12 (permalink) Old Jul 22nd, 19, 05:42 AM
Team Member
Don
 
Join Date: Jun 2006
Location: Mountain Springs, Texas
Posts: 3,454
Re: Battery Drain

I would pull fuses one at a time and place a DC ammeter across the two fuse contacts. You will measure the current through that fuse. It should be zero or very close to it.

Don
wireboy355 and oldschoolchevy like this.

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1956 Cameo project - C5 drivetrain
1957 Buick Caballero project
dhutton is offline  
post #3 of 12 (permalink) Old Jul 22nd, 19, 07:12 AM
Senior Tech
Robert
 
Join Date: Jul 2005
Location: Elizabeth, Colorado
Posts: 464
Garage
Re: Battery Drain

First remove the battery or disconnect it completely and charge it and leave it sit overnight. It may have a bad cell and be discharging itself with no outside help. But then definitely do the fuse test.
wireboy355 likes this.

AKXtreme
69 Camaro L48 SS350
M20 4spd
akxtreme is offline  
 
post #4 of 12 (permalink) Old Jul 22nd, 19, 08:13 AM
Super Moderator
Bess-68's rule
 
Everett#2390's Avatar
 
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,585
Garage
Re: Battery Drain

Remove a cable from battery post and insert a test light, I.e., 1156, any single filament bulb, between disconnected cable and post.
Current drawn will be limited due to bulb filament.
The dimmer the bulb, the less current demanded.
Lights are better to see than a gauge.
If no light, then poorly charged battery or bad battery, as suggested.
rp930 and oldschoolchevy like this.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
'
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - maybe this year, 2019 ...
Everett#2390 is offline  
post #5 of 12 (permalink) Old Jul 22nd, 19, 11:49 AM Thread Starter
Senior Tech
Bruce
 
Join Date: Mar 2008
Location: Waxhaw, NC
Posts: 2,504
Re: Battery Drain

Would a test light work as well? Does it matter which post? Could the alternator have anything to do with it? The battery has been disconnected on a battery maintainer most of its life due to the discharging issue . . . time to fix it!!
The Camaro Guy is offline  
post #6 of 12 (permalink) Old Jul 22nd, 19, 12:06 PM
Senior Tech
Robert
 
Join Date: Jul 2005
Location: Elizabeth, Colorado
Posts: 464
Garage
Re: Battery Drain

The alternator could be part of the problem if it isn't fully charging the battery. You would need a volt meter to test the output of the alternator, or take it to autozone or another autoparts store and they will test it for free. Also the battery maintainer help extend the life of the battery, but do not ensure that it is working properly.

AKXtreme
69 Camaro L48 SS350
M20 4spd
akxtreme is offline  
post #7 of 12 (permalink) Old Jul 22nd, 19, 12:09 PM
Senior Tech
Jim
 
Join Date: Dec 2002
Location: Saint Louis, Missouri
Posts: 1,089
Re: Battery Drain

Quote:
Originally Posted by The Camaro Guy View Post
Would a test light work as well? Does it matter which post? Could the alternator have anything to do with it? The battery has been disconnected on a battery maintainer most of its life due to the discharging issue . . . time to fix it!!
A test light "may" work but I have no experience using one to check for current draws because I bought a meter years ago to know more of what I am dealing with. We could assume that with a bright illumination of a test light bulb we have a bigger draw than if it was not as bright but it doesn't give us a number. Someone may have figured out a way to get an idea when a particular bulb such as an 1156 or 1157 bulb is used that a decent brightness the draw is 5A (and this is just a random number I'm throwing out) but at a barely seen illumination with no other ambient light in the room this now means you have 0.01A draw.

I'm guessing you have friends that may have a meter you could borrow or have them come by to show you how one works and that would be ideal so maybe ask around.

As far as troubleshooting, removing the fuses one at a time under the dash or even all of them may still leave the car with a battery drain and one could have issues with the alternator, the voltage regulator, and/or even the horn/key buzzer relay.

While you have been having an issue for a while, I would go ahead with using a test light but ideally get a meter. Using the test light can be used on either post to cable end. Be aware too that if the test light is using LED's then this brings in different ways it can or cannot be hooked up and/or used.

JIm

1974 Spirit Of America Nova (being restored), 1973 Nova Custom, 1968 Chevy II (Garage Find 2012)

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by SOA-Nova; Jul 22nd, 19 at 01:05 PM.
SOA-Nova is offline  
post #8 of 12 (permalink) Old Jul 22nd, 19, 04:46 PM
Super Moderator
Bess-68's rule
 
Everett#2390's Avatar
 
Join Date: Sep 2000
Location: Va Beach VA
Posts: 31,585
Garage
Re: Battery Drain

True, an ammeter is best, but the tech has to make an adjustment, then go look at meter and repeat.
With alight, and long leads to drvr side, makes the situation alittle easier.
As I suggested, the bulb filament limits the amount of current drawn as shown by the brilliance of the bulb.
A test light can be used, but not an LED.
Hook the light between the disconnected cable and post from originally attached and the bulb does not matter the direction it is connected.
It works both ways.

Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
'
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - maybe this year, 2019 ...
Everett#2390 is offline  
post #9 of 12 (permalink) Old Jul 22nd, 19, 04:53 PM
Senior Tech
 
Join Date: Nov 2018
Posts: 759
Re: Battery Drain

While a DVM will show exact draw and do much more....I use this cheap "test light" to probe wires/circuits.

https://www.harborfreight.com/6-12-v...ster-4288.html
SoCal805 is offline  
post #10 of 12 (permalink) Old Jul 22nd, 19, 05:22 PM
Team Member
Don
 
Join Date: Jun 2006
Location: Mountain Springs, Texas
Posts: 3,454
Re: Battery Drain

Oh come on..... $8.49 and free shipping....

https://www.ebay.com/itm/VELLEMAN-DV...UAAOSwEeFVOr5H

And you can connect the leads either way, just changes the polarity....

Don

1969 Camaro LSA 6L90E AME subframe and IRS
1969 Camaro vert LS3 4L65E Ridetech level 2 - sold
1959 El Camino project
1969 Mustang Sportsroof project
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1956 Cameo project - C5 drivetrain
1957 Buick Caballero project
dhutton is offline  
post #11 of 12 (permalink) Old Jul 22nd, 19, 05:37 PM
Senior Tech
Jon
 
Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Posts: 5,489
Re: Battery Drain

A bad diode in the alternator can also cause a battery to drain overnight. Pull the plug in connector off the alternator while having the test light between the battery and battery cable will help confirm it.

Jon N

The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.
dyno jonn is online now  
post #12 of 12 (permalink) Old Jul 22nd, 19, 06:35 PM Thread Starter
Senior Tech
Bruce
 
Join Date: Mar 2008
Location: Waxhaw, NC
Posts: 2,504
Re: Battery Drain

Thanks guys, I will get at it tomorrow. I have an amp meter and a coupla test lights to check it out. Will let you all know.
The Camaro Guy is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome