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Author Topic: Battery drain causes?  (Read 895 times)

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Offline anrkii

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Battery drain causes?
« on: May 31, 2013, 03:48:34 AM »
Every time my eagle sits for more than a couple of days it drains the battery flat.

Are there any typical causes of this on these cars?

I notice as soon as I hook up a charged battery the chime under the dash beeps for a moment, is this normal?

Offline BenM

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Re: Battery drain causes?
« Reply #1 on: May 31, 2013, 09:01:01 AM »
My top suspects are a bad diode in the alternator, a common problem with all Delco alts, or a bad oil pressure switch.

The switch can be checked by seeing if there's any voltage at the electric choke wire, and the alternator can be checked at most major auto chains for free while it's in the car. The alt is a Delco 10si with an internal regulator and cheap, or the regulator easily replaced.
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Offline eagleman

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Re: Battery drain causes?
« Reply #2 on: May 31, 2013, 11:54:24 AM »
I agree with Ben,check the alternator.Sounds like it may have a open circuit.
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Offline DaemonForce

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Re: Battery drain causes?
« Reply #3 on: May 31, 2013, 06:33:03 PM »
Check for any aux devices that are eating more energy than they should, bad alternator, bad oil pressure switch, shorted power window switch, shorted power seat switch(I'm not kidding)...Outside of that I can't help you.
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AMC 258C {R2:11.Oct.12}
Carter 2681 {R2:28.Oct.12}
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Offline 1985amceagle

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Re: Battery drain causes?
« Reply #4 on: May 31, 2013, 07:18:08 PM »
if you would unhook one circuit at a time, it would narrow down on what is. I provided a fuse chart also that Mudkicker originally posted:


Offline JayRamb

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Re: Battery drain causes?
« Reply #5 on: May 31, 2013, 08:03:33 PM »
if you would unhook one circuit at a time, it would narrow down on what is. I provided a fuse chart also that Mudkicker originally posted:


I am having the same exact problem with my battery running low after about a week of sitting. I do have a question, it's been a long day so forgive me but, how could unhooking one circuit at a time narrow down my problem...thanks in advance.
Jayson H.
Best HWY Mileage of 87 Eagle:  26.2 MPG

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1987 Garnet Red Eagle: 64,500 miles
SOLD 1984 Black Eagle Limited w/Tach & gauge cluster: 245,100 miles SOLD
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Offline JayRamb

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Re: Battery drain causes?
« Reply #6 on: May 31, 2013, 08:08:05 PM »
Oh Plus, it happens to drain if I disconnect the positive battery cable. It will still drain. What gives?
Jayson H.
Best HWY Mileage of 87 Eagle:  26.2 MPG

Believer in AMSOIL & Seafoam


1987 Garnet Red Eagle: 64,500 miles
SOLD 1984 Black Eagle Limited w/Tach & gauge cluster: 245,100 miles SOLD
1967 Rambler Rebel 4 Door 290 V8 (original family car) Marina Aqua 136K miles
1967 Rambler Rebel 4 Door 290 V8 parts car in Marina Aqua
2009 Nissan Murano SL

Offline DaemonForce

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Re: Battery drain causes?
« Reply #7 on: May 31, 2013, 09:20:17 PM »
That's the last thing you can do before deciding it's just a bad battery. Time to replace it.
1983 Limited
AMC 258C {R2:11.Oct.12}
Carter 2681 {R2:28.Oct.12}
TorqueFlite A998 {R6: -20.Apr.12}
NP129 {R2:28.Apr.12}
M35-273 {???}
Compression: 10.5:1
Corrected Idle: 500RPM

Offline mudkicker715

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Re: Battery drain causes?
« Reply #8 on: May 31, 2013, 09:28:12 PM »
Disconnecting one circuit at a time with an amp meter tells you what circuit has the biggest draw.

Current amc's
82 concord waggy 258 DD
84 eagle sedan stroker DD
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Offline 1985amceagle

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Re: Battery drain causes?
« Reply #9 on: June 01, 2013, 10:28:09 AM »
Thanks mk for posting that. I was figureing that if you unhook a circuit so it is not getting power, you would be able to just the items on that circuit.

Offline carnuck

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Re: Battery drain causes?
« Reply #10 on: June 02, 2013, 03:47:15 PM »
You can put an ammeter between the clamp and post. It should read zero with everything turned off. Glovebox light tends to stick. If you have self leveling air ride (like mine) I have to shut the switch off if I let it sit loaded. If you park on an angle the underhood light can come on. Brake light switch can stick. Bad alt was suggested too.
   
IF THE BATTERY GOES DEAD WITHOUT A CABLE ON IT, IT'S A BAD BATTERY. PERIOD!
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Offline anrkii

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Re: Battery drain causes?
« Reply #11 on: June 05, 2013, 03:16:20 AM »
got it figured out, when I pulled out of the garage at night I noticed the headliner was glowing under the pass. sunvisor. the visor mirror light had been on for who knows how long!

Sometimes its the silly things that get you.

Offline eagleman

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Re: Battery drain causes?
« Reply #12 on: June 05, 2013, 05:16:09 PM »
That is good news and a simple fix.Ya know sometimes one can't see the forest for the trees. Glad you found it!
Turkeys walk.Eagles fly!!!

 

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