Battery draw?

Tiny
MARY MENARD
  • MEMBER
  • 2010 FORD EXPLORER
  • 800,000 MILES
Pulled #2 fuse in passenger compartment fuse box and problem went away. What is my next step?
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Monday, August 29th, 2016 AT 7:10 AM

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Tiny
HMAC300
  • MECHANIC
  • 48,606 POSTS
Put fuse back in and check for a parasitic draw to see what fuse is connected to fuse 2 powers smart junction box which may be bad have a look at this guide to help us find the problem

https://www.2carpros.com/articles/car-battery-dead-overnight

Please run down this guide and report back.
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Monday, August 29th, 2016 AT 9:49 AM
Tiny
MARY MENARD
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Sorry, what is the smart junction box. And where is it?
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Monday, August 29th, 2016 AT 10:38 AM
Tiny
HMAC300
  • MECHANIC
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That is the fuse box inside the car it has some electronics that run different things. See pic it powers the horn relay which is an integeral part of the smart junction box. I don't see any tsb's or recalls on this but check with a mechanic he may be able to fix it without getting a new junction box.
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Monday, August 29th, 2016 AT 10:50 AM
Tiny
MARY MENARD
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This is the fuse box we pulled #2 out of. What is next?
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Monday, August 29th, 2016 AT 11:10 AM
Tiny
HMAC300
  • MECHANIC
  • 48,606 POSTS
The relay for the horn is internal so it has to have the whole fuse box replaced or a mechanic will have to wire a separate relay in if there is no short in wiring keeping the draw going.
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Monday, August 29th, 2016 AT 11:57 AM
Tiny
CAROL 38
  • MEMBER
  • 1 POST
  • 2010 FORD EXPLORER
  • 4.0L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 77 MILES
My battery goes drained after setting two days. I was told it has something to do with number two fuse.
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Monday, December 21st, 2020 AT 10:47 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

If you remove the fuse does it still drain? This guide will help fix it

https://www.2carpros.com/articles/car-battery-dead-overnight

Please run down this guide and report back.

Roy
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Monday, December 21st, 2020 AT 10:47 AM (Merged)
Tiny
CDOVES
  • MEMBER
  • 2 POSTS
  • 2010 FORD EXPLORER
  • 95,000 MILES
I have gone through 3 batteries in the past six months. As soon as the car sits for a day or two the battery is dead. Went to get a quick free alternator, starter test and they said both were fine. I finally take it to a dealership. They just called and said my starter is drawing excessive ampage and that is why I have the long crank. I didn't even know I had a long crank. I ask if the starter would drain the battery as it sits and they said no but that my starter problem would cause it not to start. I keep trying to tell them that my issue is that something is draining my battery. If we recharge the battery the car starts no problem. Something is not adding up to me and they won't allow me to talk to the tech directly? I really don't understand that part. Anyhow will a bad starter drain the battery when the car sits idle for a couple days?
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
It's possible tell the dealer you have it at you want them to check. For. Excessive parasitic draw.
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
CDOVES
  • MEMBER
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Thank you for your response. I did have them check and they said they found no drains. I guess I will just give the ok to replace the starter but I just can't fight the gut feeling that the starter is not my main problem. It's just frustrating. Thank you again for your time
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
If it still. Drains. Let me know. And we. Will. Talk more about it.
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
WRESTLER158
  • MEMBER
  • 2 POSTS
  • 2006 FORD EXPLORER
My 2006 Ford Explorer has a phantom battery drain every 3-5 days. I took my vehicle into the local Ford dealership and a local auto electric shop where they performed system and draw tests that showed no draw on the battery. They told we they would have to have it hooked up to the tester when the draw was happening in-order to catch it. Could this be something as simple as the radio not shutting down or the mercury switch on the hood light sticking and running the battery down when the car is turned off? Or would their tests catch this sort of draw? It seems kind of ridiculous that the dealership has no answer for this problem.
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

This can be just a weak battery that needs to be replaced but to be sure here is a guide to help us.

https://www.2carpros.com/articles/car-battery-load-test

if okay this guide will help run down the battery drain issue.

https://www.2carpros.com/articles/car-battery-dead-overnight

Please run down these guides and report back.

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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
WRESTLER158
  • MEMBER
  • 2 POSTS
Thank's I went over the guides and ended up replacing the battery which fixed the issue, great site btw I cant believe it is free.
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
FOLEY777
  • MEMBER
  • 6 POSTS
  • 2004 FORD EXPLORER
  • V8
  • 4WD
  • AUTOMATIC
  • 78,000 MILES
The ABS fuses when pulled touch them and they will light up the tester. Is there anyway to find where the short is? I know nothing about electronics. Also the ABS light came on and wont shut off. Lee
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
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Good afternoon,

You check current draw, not voltage. Voltage does not drain a battery, current flow does. I attached a guide for you to follow.

https://www.2carpros.com/articles/car-battery-dead-overnight

Roy
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
TBICE3095
  • MEMBER
  • 1 POST
  • 2002 FORD EXPLORER
  • 4.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 238,500 MILES
I have replaced my car battery, I also replaced the starter and alternator. I took out the #40 fuse and the battery light finally went off. What does that mean? Also before I put the new battery in yesterday I had to keep jumping it off and I changed the wires on the battery. Also the driver door electrical system does not work. On the dash it keeps saying door ajar and the overhead lights stay on. What could that be?
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

If you install the fuse, does all the other accessories work again?

Can you verify that fuse number? It does not show on my diagrams.

https://www.2carpros.com/articles/how-to-check-wiring

I attached a wiring diagram for you to view. Make sure you have power to the alternator with the key in the on position.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Roy
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
DANNY WHITE
  • MEMBER
  • 1 POST
  • 2002 FORD EXPLORER
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Something is draining the power in my battery. I have checked the interior lights, headlights, cigarette lighter, glove compartment light, and under the hood but can't find the culprit. Battery and alternator are good. Any suggestions?
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Monday, December 21st, 2020 AT 10:48 AM (Merged)
Tiny
TBEAUWHITE
  • MEMBER
  • 2 POSTS
If you have a test light, you can take the negative battery cable off, attach 1 end of light to the battery and 1 end to the cable, if it lights up bright you for sure have a drain. With light attached start pulling fuses 1 at a time and see if light goes out. If it does at least you have found the circuit that is causing the problem, make sure you check and see what all is controlled by that fuse. Also make sure all doors are shut and hood light bulb is out. Hope this helps
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Monday, December 21st, 2020 AT 10:48 AM (Merged)

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