Battery drain (overnight) - Ford Mustang Forum
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post #1 of 18 (permalink) Old 07-10-2019 Thread Starter
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Battery drain (overnight)

This happened once before, but I thought it had been a fluke (left a light on somewhere), but after coming back home from work (5pm) I didn't drive anywhere until leaving for work at 5:30am. Turn the ignition and click click click (barely even cranked). it seems to me that it is obvious that there is a battery drain. Anyone have had this problem. I know a lot of people complained of battery draining after having the car sit for weeks, or even months at a time. But having a battery drain for 12 hours.....seems excessive!


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post #2 of 18 (permalink) Old 07-10-2019
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First clean the battery cable ends and battery posts. Give the battery a good charge. Make sure your dome lights are not on and the CD player is not going bezerk. If the battery is not holding a charge replace it.


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post #3 of 18 (permalink) Old 07-10-2019
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yep, like he said, likely causes:
1) the Shaker stereo is using power, even though it is supposedly off -- make sure you turn it off before turning off the ignition, or remove the fuse to be 100% positive that is not the cause . . . if it still drains overnight, then most likely:
2) the battery is old and no longer holding a charge

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post #4 of 18 (permalink) Old 07-10-2019
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It's probably your battery going bad. Drive it down to your local car parts store and they will test your charging system for 'free'.
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post #5 of 18 (permalink) Old 07-10-2019 Thread Starter
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After they do some investigating I hooked up the multimeter to the battery and found out that I have a .6 amp drain.

after pulling every fuse I found out that fuse number one which apparently is it 80 amp fuse that goes to the passenger side fuse box is causing the drain. I will tackle this tomorrow however I'm sure about where the heck is this passenger side fuse box is
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"To find yourself, you must first lose yourself"

-2014 Ford Mustang GT Premium- Black (Comfort Package, Reverse Sensing & Security Package, Brembo Package)
-1997 Lincoln Town Car (Executive Series)
-1989 Lincoln Towncar (Signature Series)
-1973 Volkswagen Bus (Weekender)
-2001 Kawasaki Vulcan (1500 Classic)
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post #6 of 18 (permalink) Old 07-10-2019 Thread Starter
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"To find yourself, you must first lose yourself"

-2014 Ford Mustang GT Premium- Black (Comfort Package, Reverse Sensing & Security Package, Brembo Package)
-1997 Lincoln Town Car (Executive Series)
-1989 Lincoln Towncar (Signature Series)
-1973 Volkswagen Bus (Weekender)
-2001 Kawasaki Vulcan (1500 Classic)
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post #7 of 18 (permalink) Old 07-11-2019
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passenger side fuse box is inside the car, in the footwell on the passenger side -- it can be a little hard to find under the carpet, but it is there

I am not sure what fuses are in there, but would not be surprised if the stereo fuse is in there, and that is the source of the draw

fuse detail should be in the manual


EDIT: had to come back and remove the extra line breaks that this editor puts in when using Firefox browser

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post #8 of 18 (permalink) Old 07-11-2019
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I believe you're in for a new battery. You never did say how old it is, and so I assume it's an original. Your .6 amp draw is roughly 7.8 watts. Assuming your battery has a 50 Ah capacity, it should take 64 hours to drain the battery. https://www.jamestowndistributors.co....do?docId=1019
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post #9 of 18 (permalink) Old 07-12-2019 Thread Starter
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Yes battery is original.


I cleaned the contacts on the clamps and battery posts and bought a new everstart maxx multimeter to troubleshoot more.


I have to take it to advance autoparts to test out my battery.


One thing I have noticed is when I didn't use the alarm overnight, the car sat from 7pm last night to 2pm today and when I started the car it barely turned over. and when the car turned over I kept hearing clicking and the needles on the gauges kept shaking for a second. It was pretty weird to say the least.

"To find yourself, you must first lose yourself"

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-1997 Lincoln Town Car (Executive Series)
-1989 Lincoln Towncar (Signature Series)
-1973 Volkswagen Bus (Weekender)
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post #10 of 18 (permalink) Old 07-12-2019 Thread Starter
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Also, isn't .6 amps excessive drain?

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-1997 Lincoln Town Car (Executive Series)
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Go buy a new battery, yours is toast.

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Quote:
Originally Posted by porschpow View Post
. . . I have to take it to advance autoparts to test out my battery.

. . . it barely turned over. and when the car turned over I kept hearing clicking and the needles on the gauges kept shaking for a second. It was pretty weird to say the least.

don't put too much faith in the Advance Auto battery test -- I have had that test show my battery as good, when it was not . . . but it's a worth a try


the clicking and gage dancing is typical with a weak or near dead battery


Quote:
Originally Posted by porschpow View Post
Also, isn't .6 amps excessive drain?

yes it is -- normal is something like 50-100 mili-amps if I remember correctly . . . so yeah it is worth the effort to chase down that draw

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post #13 of 18 (permalink) Old 4 Weeks Ago Thread Starter
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Update,


I took the car to advance and they ran the test. The guy said the battery is rated for 590 CCA (cold cranking amps) but the test showed 385 CCA @ 12.5 V. I was told that I should charge the battery and bring it back to get it tested again. So, a few days ago, I put it on the trickle charger and as of testing voltage from my multimeter, I got 13.5 V with the cables not connected. Before I put it on the trickle charger today, I will check the voltage to see if it went down (solidifying battery is not good since it can't hold a charge).

"To find yourself, you must first lose yourself"

-2014 Ford Mustang GT Premium- Black (Comfort Package, Reverse Sensing & Security Package, Brembo Package)
-1997 Lincoln Town Car (Executive Series)
-1989 Lincoln Towncar (Signature Series)
-1973 Volkswagen Bus (Weekender)
-2001 Kawasaki Vulcan (1500 Classic)
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post #14 of 18 (permalink) Old 4 Weeks Ago
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You battery is at least 5 years old, if not 6. It's time for a new one.
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post #15 of 18 (permalink) Old 3 Weeks Ago Thread Starter
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So anybody use Interstate batteries?

Apparently COSTCO doesn't have my battery size , fitment code 32 @ 590 CCA. I am tempted to get a battery close it the size I have. Would CCA over 590 screw with the electronic system?


"To find yourself, you must first lose yourself"

-2014 Ford Mustang GT Premium- Black (Comfort Package, Reverse Sensing & Security Package, Brembo Package)
-1997 Lincoln Town Car (Executive Series)
-1989 Lincoln Towncar (Signature Series)
-1973 Volkswagen Bus (Weekender)
-2001 Kawasaki Vulcan (1500 Classic)
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