5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

something is drawing power

Thread Tools
 
Search this Thread
 
Old Apr 13, 2009 | 09:31 PM
  #1  
thefordguy's Avatar
thefordguy
Thread Starter
 
Joined: Apr 2009
Posts: 5
From: PA
Default something is drawing power

I have a fox mustang that draws power when car is off and always kills the battery i have no idea whats wrong with it any ideas?
Old Apr 13, 2009 | 09:39 PM
  #2  
mjr46's Avatar
mjr46
D.R. THE PATHETIC DORK
 
Joined: Jun 2007
Posts: 30,871
From: West Virginia
Default

multimeter set to amps hooked in series with neg battery terminal and neg battery post will indicate amount of draw, safe spec 25-50 milliamp and pull fuses until drain is in spec and there you'll have the circuit on which the draw exists, from there unplug components on that circuit until draw is gone and there will be the prob component, simple things to check are trunk light, glove box light, sunvisor lights or bad alt, this can be confirmed by removing the charge wire from alt/unplug it, and watching drain disappear on multimeter
Old Apr 13, 2009 | 09:40 PM
  #3  
j-wigg's Avatar
j-wigg
2nd Gear Member
 
Joined: Oct 2008
Posts: 237
From: Florida
Default

glove box light switch was doing it on mine only because i had and still have some dashes pieces off to paint. had to tape the switch closed. no bulb was in for me to see that the light was even on. and i didnt think it would draw power without a bulb in it.
Old Apr 13, 2009 | 09:55 PM
  #4  
thefordguy's Avatar
thefordguy
Thread Starter
 
Joined: Apr 2009
Posts: 5
From: PA
Default

I pulled fuses one by one still did it and it is a major draw becouse as soon as you touch the terminal to batt it arcs alot
Old Apr 13, 2009 | 09:59 PM
  #5  
mjr46's Avatar
mjr46
D.R. THE PATHETIC DORK
 
Joined: Jun 2007
Posts: 30,871
From: West Virginia
Default

....you need a multimeter hooked in series like I said : read my post!!! like I said try unhooking the alt charge wire... read please!!
Old Apr 13, 2009 | 10:07 PM
  #6  
thefordguy's Avatar
thefordguy
Thread Starter
 
Joined: Apr 2009
Posts: 5
From: PA
Default

its a brand new alt tho i will hook a multimeter up to it
Old Apr 13, 2009 | 10:16 PM
  #7  
mjr46's Avatar
mjr46
D.R. THE PATHETIC DORK
 
Joined: Jun 2007
Posts: 30,871
From: West Virginia
Default

here follow this:
http://flashoffroad.com/electrical/B...teryDrain.html
Old Apr 13, 2009 | 10:32 PM
  #8  
thefordguy's Avatar
thefordguy
Thread Starter
 
Joined: Apr 2009
Posts: 5
From: PA
Default

thanks ill read that
Old Apr 13, 2009 | 10:38 PM
  #9  
mjr46's Avatar
mjr46
D.R. THE PATHETIC DORK
 
Joined: Jun 2007
Posts: 30,871
From: West Virginia
Default

no problem...and good luck
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jrrhd73must
Classic Mustang General Discussion
2
Oct 2, 2015 09:17 PM
KingRando
2005-2014 Mustangs
5
Oct 2, 2015 08:06 AM
ChampInSD
5.0L GT S550 Tech
13
Oct 2, 2015 04:55 AM
MustangForums Editor
General Tech
0
Sep 25, 2015 06:58 PM




All times are GMT -5. The time now is 10:27 PM.