What is draining my battery?? - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > Car Audio, SYNC, MyFord Touch & Electronics

Car Audio, SYNC, MyFord Touch & Electronics The Forum for the Ford Focus audiophiles. The place to chat about automobile sound systems, security systems, or show off your I.C.E.!
Sponsored By: GT Sound Control


Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 07-14-2007, 03:15 PM   #1
ligardner
Focus Jr. Enthusiast
 
Join Date: Feb 2006
Fan#: 32567
Location: Alpharetta, Georgia, United States
What I Drive: 02 Focus LX; 05 Focus ZX4; 02 Wago

Posts: 49
Points 982, Level 16
Points: 982, Level: 16 Points: 982, Level: 16 Points: 982, Level: 16
Level Up 82% Completed
Level up: 82% Level up: 82% Level up: 82%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 ligardner Good Standing Member
Buy-Sell-Trade Rating: (0)
Question What is draining my battery??

I posted this a few hours ago in the Tchnical chat but got no help so I'm trying again:

This 02 Focus has developed a battery draining problem that I cannot solve. Back in early May I installed A1Electric keyless entry on this car. It took about 4 weeks because I worked on it part time, and had to install a horn relay and remote trunk relay. So the car sat without being run for better part of a month. But the battery is only about 1 yr. old.

Then about 3 weeks ago I tried to start the car and it was 100% dead--no clicking, no power doors, nothing. I thought maybe a light had been on so didn't worry too much. Then it happened again, and then again, even though the car was being driven. I bought a digital voltmeter on Monday to see if I had a "parasitic" drain problem. Hooked up the 10 amp side of the DVOM in series to the unhooked neg. battery terminal and read 4.7 A (this might be 470 mA?). In any case, this is 3 times the reading I get on my 2005 Focus, which is about 1.2 to 1.4.

So I followed the suggestions from some of the parasitic drain posts that recommended pulling out fuses to see what electrical component is pulling power from the battery. I have pulled out every single fuse in the fusebox and in the engine compartment fusebox and with fuses removed (in groups of 4 to 8) NOTHING CHANGED the parasitic drain reading. Then I pulled the power connector from the A1electric main relay, and connector to the keyless electronic brain box--and with these removed, the result again is NO CHANGE.

I am stumped. the alternator seems fine. Autozone checked both it and the battery on their machine--said they were good. When I run the car for 10 min. the battery pumps up to about 12.4 volts. Then left overnight, it drops down to 11.5 volts or lower. I pulled the neg. battery cable off last night and let car sit overnight like that--and it did not drain down (duh!).

Any ideas on what to try now?
- is there a piece of test equipment that would help?
- battery saver relay be checked or replaced?

Any suggestions that would help isolate this maddening problem would be appreciated. Even something as basic as determining whether the problem is under the hood or in passenger compartment would help.


ligardner is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 07-14-2007, 03:29 PM   #2
R3d_RovrZX3
Official FF Sanjaya
 
R3d_RovrZX3's Avatar
 
Join Date: Oct 2006
Fan#: 39824
Location: Newark, Ohio, OH
What I Drive: 2001 Infra-Red ZX3

Posts: 2,075
FF Reputation: 26 R3d_RovrZX3 Great Standing Member
Buy-Sell-Trade Rating: (4)
maybe u wired one of those relays wrong and they are constantly running power through them...not sure how a little relay would drain a car battery, but might be worth checking out...i have no idea
__________________
Focus on a budget!
R3d_RovrZX3 is offline  
    Reply With Quote Quick reply to this message
Old 07-14-2007, 04:16 PM   #3
ligardner
Focus Jr. Enthusiast
 
Join Date: Feb 2006
Fan#: 32567
Location: Alpharetta, Georgia, United States
What I Drive: 02 Focus LX; 05 Focus ZX4; 02 Wago

Posts: 49
Points 982, Level 16
Points: 982, Level: 16 Points: 982, Level: 16 Points: 982, Level: 16
Level Up 82% Completed
Level up: 82% Level up: 82% Level up: 82%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 ligardner Good Standing Member
Buy-Sell-Trade Rating: (0)
Hmm, you may be onto something. I forgot..., there is a weird in-line fuse that came with the A1Electric stuff. I forgot about that one. It is on the main hot lead& think it safeguards the A1Electric components. I'll pull that one out and see what changes. Can't remeber if the two relays have hot leads that pair off that fused lead. Damn--wish I had drawn a complete wiring diragram of that A1 locks installation This probably serves me right.
ligardner is offline  
    Reply With Quote Quick reply to this message
Old 07-14-2007, 04:19 PM   #4
R3d_RovrZX3
Official FF Sanjaya
 
R3d_RovrZX3's Avatar
 
Join Date: Oct 2006
Fan#: 39824
Location: Newark, Ohio, OH
What I Drive: 2001 Infra-Red ZX3

Posts: 2,075
FF Reputation: 26 R3d_RovrZX3 Great Standing Member
Buy-Sell-Trade Rating: (4)
put up a post once u figure it out...im curious how close i was, haha
__________________
Focus on a budget!
R3d_RovrZX3 is offline  
    Reply With Quote Quick reply to this message
Old 07-14-2007, 04:49 PM   #5
ligardner
Focus Jr. Enthusiast
 
Join Date: Feb 2006
Fan#: 32567
Location: Alpharetta, Georgia, United States
What I Drive: 02 Focus LX; 05 Focus ZX4; 02 Wago

Posts: 49
Points 982, Level 16
Points: 982, Level: 16 Points: 982, Level: 16 Points: 982, Level: 16
Level Up 82% Completed
Level up: 82% Level up: 82% Level up: 82%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 ligardner Good Standing Member
Buy-Sell-Trade Rating: (0)
Well, I pulled that in-line fuse that controls the A1Electric power door locks. NO CHANGE. But I do not know for sure that the hot leads to the 2 relays (horn&trunk) are downstream from that fuse. Will look under the dash and trace the hot leads to those relays.
ligardner is offline  
    Reply With Quote Quick reply to this message
Old 07-14-2007, 05:18 PM   #6
ligardner
Focus Jr. Enthusiast
 
Join Date: Feb 2006
Fan#: 32567
Location: Alpharetta, Georgia, United States
What I Drive: 02 Focus LX; 05 Focus ZX4; 02 Wago

Posts: 49
Points 982, Level 16
Points: 982, Level: 16 Points: 982, Level: 16 Points: 982, Level: 16
Level Up 82% Completed
Level up: 82% Level up: 82% Level up: 82%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 ligardner Good Standing Member
Buy-Sell-Trade Rating: (0)
AARGH, I undid the one remaining relay for the power door locks and NOTHING CHANGED.
Am I missing something about how to deal with a parasitic drain? Is there a better way to diagnose it than pulling fuses????
ligardner is offline  
    Reply With Quote Quick reply to this message
Old 07-14-2007, 07:13 PM   #7
R3d_RovrZX3
Official FF Sanjaya
 
R3d_RovrZX3's Avatar
 
Join Date: Oct 2006
Fan#: 39824
Location: Newark, Ohio, OH
What I Drive: 2001 Infra-Red ZX3

Posts: 2,075
FF Reputation: 26 R3d_RovrZX3 Great Standing Member
Buy-Sell-Trade Rating: (4)
leave ur car like that with everything out and see if the battery still runs dead...idk
__________________
Focus on a budget!
R3d_RovrZX3 is offline  
    Reply With Quote Quick reply to this message
Old 07-22-2007, 04:31 PM   #8
ligardner
Focus Jr. Enthusiast
 
Join Date: Feb 2006
Fan#: 32567
Location: Alpharetta, Georgia, United States
What I Drive: 02 Focus LX; 05 Focus ZX4; 02 Wago

Posts: 49
Points 982, Level 16
Points: 982, Level: 16 Points: 982, Level: 16 Points: 982, Level: 16
Level Up 82% Completed
Level up: 82% Level up: 82% Level up: 82%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 1 ligardner Good Standing Member
Buy-Sell-Trade Rating: (0)
UPDATE: the problem was the alternator. I got a suggestion on the Technical Chat that pointed me in that direction. When I pulled the big red lead off the alternator the problem went away.

Diodes gone bad is apparently the cause; not sure why they died.
Have a new alternator now and the car is back in business...
ligardner is offline  
    Reply With Quote Quick reply to this message
Reply

Bookmarks & Social Networks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum 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 for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
HELP Somethings draining my battery ligardner General Technical Chat 13 04-21-2013 04:48 PM
Please HELP - Battery light VR6guy General Technical Chat 11 02-06-2007 08:56 PM
DTC Codes (Detailed Descriptions) S2 General Technical Chat 13 12-11-2006 12:06 PM
2nd battery, asking for helpful advice sc0tty8 Car Audio, SYNC, MyFord Touch & Electronics 0 10-22-2005 10:17 AM
battery light and ground problems natdog General Technical Chat 0 01-19-2005 11:36 AM


All times are GMT -5. The time now is 10:33 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Audi S3, Ford Fusion and Acura TLX. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. Challenger Hellcat - Charger Hellcat