constant battery drain
Thread Starter
|
Senior User
Joined: Aug 2000
Posts: 203
Likes: 0
constant battery drain
in about 12 hours my batt goes from 12-13 volts to 1-3 volts, the key is in the off position. this is for a 84 f-250. yet when i plug in my 1.5 amp battery maintainer the battery will recharge to max. what is taking the power?
New User
Joined: Jan 2008
Posts: 0
Likes: 24
constant battery drain
Either c=viit my gallery page or my web page for diagnosing electrical shorts.
Have you charged the battery and have it tested.
Even new batteries develop shorts within themselves.
[i][font color=blue]Dennis[/font][i]
[font color=red]Calgary,Alberta,Canada[/font]
http://www.clubfte.com/users/mil1ion/Minimorleytruck.JPG
[i][font color=green]
http://www.clubfte.com/users/mil1ion/Mil1ion.html [/font][i]
[font color =green] Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [/font]
[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon [/font]
Have you charged the battery and have it tested.
Even new batteries develop shorts within themselves.
[i][font color=blue]Dennis[/font][i]
[font color=red]Calgary,Alberta,Canada[/font]
http://www.clubfte.com/users/mil1ion/Minimorleytruck.JPG
[i][font color=green]
http://www.clubfte.com/users/mil1ion/Mil1ion.html [/font][i]
[font color =green] Please Don't Ask Me Any Tough Questions,
"I'm Saving My Memory For When I Develop Alzheimer's" [/font]
[font color=blue]78 F-150 429CJ,Silver,Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon [/font]
New User
Joined: Apr 2002
Posts: 3
Likes: 0
From: Frederick USA
constant battery drain
I beleive that you have an external voltage regulator mounted on the passenger side wall. They are about 20 to 30 US dollars. I think there is will you will find your problems.
The test is simple... Unplug your negative battery cable. Take a test light. Clip one end of the test light to the negative end of the disconnected battery cable and connect the other end to the negative battery post (on the battery) If the light remains lit, then you have a short. If not, then it is your battery.
If it remains short, disconnect the small wire harness which is connected to your external volt regulator (or the wire harness connected to your alternator if it is an internal voltage regulator).
Repeat the above test using the test light. If the battery goes out, Change out your external voltage regulator or your alternator (if it is an internal voltage regulator). If the light remains on then...
Unplug each fuse located underneith your driverside dash until the light goes out.
Now if you do have an external voltage regulator and it is bad.. It is highley recommended that you replace your alternator as well. It is not mandatory but recommended..
Good luck and let us know how it goes..
Kevin
The test is simple... Unplug your negative battery cable. Take a test light. Clip one end of the test light to the negative end of the disconnected battery cable and connect the other end to the negative battery post (on the battery) If the light remains lit, then you have a short. If not, then it is your battery.
If it remains short, disconnect the small wire harness which is connected to your external volt regulator (or the wire harness connected to your alternator if it is an internal voltage regulator).
Repeat the above test using the test light. If the battery goes out, Change out your external voltage regulator or your alternator (if it is an internal voltage regulator). If the light remains on then...
Unplug each fuse located underneith your driverside dash until the light goes out.
Now if you do have an external voltage regulator and it is bad.. It is highley recommended that you replace your alternator as well. It is not mandatory but recommended..
Good luck and let us know how it goes..
Kevin
Thread
Thread Starter
Forum
Replies
Last Post
Cell's
1999 - 2003 7.3L Power Stroke Diesel
7
May 3, 2011 12:45 AM
