2000 psd batteries draining overnight

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May 27, 2012 | 12:28 PM

UNTAMND

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Joined: Jul 2009

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From: Lansdale, PA

2000 psd batteries draining overnight

My batteries are 2 years old and alt checks out fine.
Why is my truck draining the batteries.
Glow plug relay isn't stuck on so it's not that.
What else can I check

May 27, 2012 | 12:55 PM

A/Ox4

9 ECHO 1

Joined: Aug 2009

Posts: 12,467

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From: Missouri

Get a volt meter and check every fuse one at a time.

May 27, 2012 | 07:49 PM

c125bob

Elder User

Joined: Feb 2005

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From: Chattahoochee Hills, Ga.

Good advice, and..... feel your alternator first thing in the morning while everything is cool. Is it warm to touch?

Jun 20, 2012 | 06:47 PM

dbass880

5th Wheeling

Joined: May 2011

Posts: 41

Likes: 8

From: Stillwater, Ok.

Same problem here.

I am having the same problem. I just got brand new batteries about 2 months ago. I have recently put in an aftermarket stereo and a backup camera. I feel like one of those is the culprit. I checked each of the fuses with a voltmeter. I may not have been doing it right though.
I disconnected both neg. cables then touched the voltmeter to the battery post and the cable. Is that the correct way?

Jun 20, 2012 | 07:53 PM

landmobile

Senior User

Joined: Mar 2012

Posts: 492

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From: Jenkintown, PA

The way you have the meter connected is correct, just make sure it is set to read amps, not volts, and plug the probe into the correct jack on the meter. You want to read the current (amps) being drawn from the batteries, not the voltage. Current draw with doors closed and everything off should be less than .05 amps. If there is excessive draw you can remove fuses individually to isolate the source.

Chris

Jun 20, 2012 | 08:25 PM

dbass880

5th Wheeling

Joined: May 2011

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From: Stillwater, Ok.

around .2

Well I had it connected correctly. I'm getting a .2 on the draw. I guess that is enought to drain the batteries overnight? It really doesn't have to be overnight. 4-5 hours will drain them.
Thanks for that quick reply.

Jun 20, 2012 | 08:38 PM

landmobile

Senior User

Joined: Mar 2012

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From: Jenkintown, PA

0.2A is high, but it sholudn't drain your batteries in a few hours. I would have each battery individually load tested first. You might have a weak battery discharging the good one.

Chris

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Jun 20, 2012 | 08:58 PM

landmobile

Senior User

Joined: Mar 2012

Posts: 492

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From: Jenkintown, PA

If both batteries check good and they are going dead in a few hours with only 0.2A draw, then the next step will be to check the charging system.

Chris

Jun 20, 2012 | 09:07 PM

#10

dbass880

5th Wheeling

Joined: May 2011

Posts: 41

Likes: 8

From: Stillwater, Ok.

They get fully charged so I think that is ok.

Jun 20, 2012 | 10:01 PM

#11

Bonanza35

Lead Driver

Joined: Sep 2005

Posts: 9,399

Likes: 188

From: Norco,CA

Sometime the diode in the alternator goes bad and drains the system. But if you just installed new equipment and thats when it started, thats probably where it is.

Chet