Parasitic Draw - 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 > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 01-10-2015, 01:43 PM   #1
chrisski
Focus Rookie
 
Join Date: Nov 2014
Fan#: 200705
Location: Glandael, AZ
What I Drive: 2003 Ford Focus Red

Posts: 7
Points 22, Level 1
Points: 22, Level: 1 Points: 22, Level: 1 Points: 22, Level: 1
Level Up 43% Completed
Level up: 43% Level up: 43% Level up: 43%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 1 chrisski Good Standing Member
Buy-Sell-Trade Rating: (0)
Parasitic Draw

Trouble shooting what I think is a parasitic draw problem, or perhaps a battery not holding a charge. I returned from the airport after a two week trip to find my battery completely dead. Iíd been previously told my radio was causing an excessive drain.

Any wayís I canít find the source; I think itís intermittent, but here are some numbers. I think these are completely normal.

Standard Drain for a battery: 50 ma
Amp Hours of my Auto Zone Battery: 39.865
Reserve Capacity of my Auto Zone Battery: Minutes
Reserve Capacity to Amp Hour Formula: Reserve Minutes * .4167
Parasitic Draw at 0 minutes: 380 ma
Parasitic Draw at 5-35 min: 140 ma
Parasitic draw after 35minutes: 10 ma

So my battery entered sleep mode by 35 minutes.

How long will these parasitic drains take to drain my battery?

140 ma Parasitc Draw (Before Sleep Mode)
282.7607143 Hours
11.78169643 Days

10 ma Parasitc Draw (After Sleep Mode)--35 Minutes
1178.169643 Hours
49.09040179 Days


50 ma Normal Parasitic Draw
791.73 Hours
32.98875 Days

So based on the manufacturer claims, my fully charged battery should last 49 days before it needs to charge, but when I showed up at the airport, it was completely dead. The battery is only one month old, and I donít expect it to last 49 days, but I would expect to be able to start the car after 16 days. The temperatures went from 25 to 70 during that time.


chrisski is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-10-2015, 02:21 PM   #2
chrisski
Focus Rookie
 
Join Date: Nov 2014
Fan#: 200705
Location: Glandael, AZ
What I Drive: 2003 Ford Focus Red

Posts: 7
Points 22, Level 1
Points: 22, Level: 1 Points: 22, Level: 1 Points: 22, Level: 1
Level Up 43% Completed
Level up: 43% Level up: 43% Level up: 43%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 1 chrisski Good Standing Member
Buy-Sell-Trade Rating: (0)
Also measured the VDC with alternator running, engine on and got 14.8, immediately after engine shutdown battery was 12.4 so seemed normal.
chrisski is offline  
    Reply With Quote Quick reply to this message
Old 01-10-2015, 05:01 PM   #3
sailor
Elder
 
sailor's Avatar
 
Join Date: Jun 2008
Fan#: 57268
Location: Williamsville, NY
What I Drive: 2004 Pitch Black ZTS 2.3 5spd.

Posts: 18,600
Points 13,338, Level 75
Points: 13,338, Level: 75 Points: 13,338, Level: 75 Points: 13,338, Level: 75
Level Up 22% Completed
Level up: 22% Level up: 22% Level up: 22%
Forum Activity 99%
Activity: 99% Activity: 99% Activity: 99%
FF Reputation: 82 sailor Excellent Standing Member
Buy-Sell-Trade Rating: (0)
Battery's not charged up yet, 12.63 is normal for full charge.

Even new, testing it would help just in case. Loads look OK - good testing there.
__________________
"Rubber Side Down"

S.R. #275 Focus Takeover #003
sailor is online now  
    Reply With Quote Quick reply to this message
Old 01-10-2015, 06:10 PM   #4
Milton
Focus Enthusiast
 
Join Date: Sep 2011
Fan#: 89715
Location: San Antonio, TX
What I Drive: 2007 Black Focus SES 2.0 L4 4 Door

Posts: 446
Points 328, Level 6
Points: 328, Level: 6 Points: 328, Level: 6 Points: 328, Level: 6
Level Up 56% Completed
Level up: 56% Level up: 56% Level up: 56%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 10 Milton Great Standing Member
Buy-Sell-Trade Rating: (0)
As usual Sailor is correct. Here are the routine voltage checks I make every oil change:
ROUTINE VOLTAGE CHECKS:
-All voltage checks made at the battery terminal posts, not at the battery terminal post connectors)
- Check resting battery voltage, optimal is >= 12.6 Volts (engine off for 4 hours)
- Check charging voltage 13.5-14.5 Volts with all accessories on and engine at at 1200 RPM
- Check cranking voltage (>= 9.6 volts)
- Check voltage drop across positive & negative battery cables. (<= 10 millivolts)
- Inspect connections all battery cables.

Believe it or not the difference between 12.63 and 12.4 is significant. Your charging voltage is good only if it was made with ALL accessories (hi-beams, radio, wipers, defrosters, etc) on and the voltage check was made at the battery terminal posts.
Milton is offline  
    Reply With Quote Quick reply to this message
Old 01-11-2015, 12:26 PM   #5
chrisski
Focus Rookie
 
Join Date: Nov 2014
Fan#: 200705
Location: Glandael, AZ
What I Drive: 2003 Ford Focus Red

Posts: 7
Points 22, Level 1
Points: 22, Level: 1 Points: 22, Level: 1 Points: 22, Level: 1
Level Up 43% Completed
Level up: 43% Level up: 43% Level up: 43%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 1 chrisski Good Standing Member
Buy-Sell-Trade Rating: (0)
Sailor and Milton Thanks.

Question about the voltage drop--How do I measure that? Is that AC or is it the difference between the terminals and connectors or something else?

Cranking voltage is 10.6.


Sidenote:
======

I got a solar trickle charger, a Solargizer I just finished installing. I don't expect it to fix the problem I'm having now, but I do expect the next time I leave my car parked for a few days for the battery to be good when I come back after I finish this problem. You can tell if the charger is working or not by a LED indicator on the electronics.

Some milliamp stats on the solar panel output being measured across the wires with no load attached on a cloudless day at 10 am:

Outside Flat to the ground: 210 ma
Outside moved towards the sun: 384 ma
Inside car flat: 50 ma
Inside car moved towards sun: 65 ma

LED Indicator remains lit no matter where placed. Just like the instructions say, a windshield absorbs the UV rays that operate a solar panel. That's why the inside amperage is a fraction of the outside amperage. So for this thing to work correctly, it needs to be installed outside the car, just as the instructions say.
chrisski is offline  
    Reply With Quote Quick reply to this message
Old 01-11-2015, 12:56 PM   #6
FOCUS OWNER CUE
Focus Jr. Enthusiast
 
Join Date: Jan 2015
Fan#: 213737
Location: WILLIAMSVILLE, NY
What I Drive: 2001 SILVER WAGON

Posts: 32
Points 102, Level 2
Points: 102, Level: 2 Points: 102, Level: 2 Points: 102, Level: 2
Level Up 4% Completed
Level up: 4% Level up: 4% Level up: 4%
Forum Activity 4%
Activity: 4% Activity: 4% Activity: 4%
FF Reputation: 1 FOCUS OWNER CUE Good Standing Member
Buy-Sell-Trade Rating: (0)
Here is how to find a parasitic leak. Disconnect the negative terminal of your battery. Attach the milli-ammeter between the negative terminal and the negative lead - with the milli-ammeter on the highest range - like ten amperes (if that is possible) Open the door of your vehicle and verify the light comes on and the ammeter reads about one - three AMPERES. The lower the ammeter range switch or connection to read milli-amperes. If you get a reading like 100 ma - or so simply remove the fuses one at a time until the milliammeter reads zero. - You'LL need an assistant to watch the meter as you pull out the fuses - but keep going until the milliammeter reads zero. The fuse you take out that causes the zero reading is where you are loosing the current (ie Juice) from your battery.

Oh I almost forget - sometimes if the space between the battery posts ( + & -- ) is wet or damp, you can loose the charge across the top or sides of the battery depending on if it is a top post or side post. Try wiping the space between the posts with a paper towel or cloth.... and good luck...
FOCUS OWNER CUE is online now  
    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


All times are GMT -5. The time now is 02:35 PM.


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