Battery runs down ??
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Freshman User
Joined: Feb 2012
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Battery runs down ??
It appears the battery drains even when truck isn't being run.
After my latest charge battery was up to 13.02 v, 4 days later it was 12.16v, and 4 days again it was 12.05.
I believe at 12.05v the battery is now at 50% charge, and about as low as you'd ever want it to be, without incurring permanent damage to the plates.
So why is this happening, and what steps should I take ??
Thanks for any help.
After my latest charge battery was up to 13.02 v, 4 days later it was 12.16v, and 4 days again it was 12.05.
I believe at 12.05v the battery is now at 50% charge, and about as low as you'd ever want it to be, without incurring permanent damage to the plates.
So why is this happening, and what steps should I take ??
Thanks for any help.
Cargo Master
Joined: Apr 2013
Posts: 3,087
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From: Central Florida
battery drain test specific to a vehicle? What is that?
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
The point is to FOLLOW THE DIRECTIONS as well as identify what is being worked on. Failure to FOLLOW THE DIRECTIONS is a common reason for incorrect battery drain diagnostics. Generally, for Fords, there may be minor differences regarding the required timeout interval.
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Freshman User
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E-450 6.8 litre 2002
Thanks for the above responses.
Unfortunately s'vice manual doesn't offer any help in batt. drain procedures.
The batt. is 3 yrs old and lightly used.
Sorry, I neglected to mention I then recharged the batt. to 12.95v and disconnected the -ve terminal, and so far 3 days later is still at the same 12.95v.
Ron
Unfortunately s'vice manual doesn't offer any help in batt. drain procedures.
The batt. is 3 yrs old and lightly used.
Sorry, I neglected to mention I then recharged the batt. to 12.95v and disconnected the -ve terminal, and so far 3 days later is still at the same 12.95v.
Ron
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Joined: Jan 2004
Posts: 19,762
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From: St Louis
Unfortunately s'vice manual doesn't offer any help in batt. drain procedures.
A battery that is disconnected should maintain its internal charge almost indefinitely, there's only a tiny bit of internal current leakage typically present unless the battery is failing.
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Cargo Master
Joined: Apr 2013
Posts: 3,087
Likes: 24
From: Central Florida
Actually, it does. See section 414-00 of the WSM. The specific procedure is there. It is attached. See how much easier it is to provide specifics when the vehicle under consideration is known?
A battery that is disconnected should maintain its internal charge almost indefinitely, there's only a tiny bit of internal current leakage typically present unless the battery is failing.
A battery that is disconnected should maintain its internal charge almost indefinitely, there's only a tiny bit of internal current leakage typically present unless the battery is failing.
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Hotshot
Joined: Jan 2004
Posts: 19,762
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From: St Louis
If you provide specifics for what you need, it's pretty easy to post excerpts that give you the information needed to get you going.
Of course, it's always handy to have your own set of manuals for stuff down the road. I've managed to accumulate a set that covers from 1992 to 2014 model years.
Of course, it's always handy to have your own set of manuals for stuff down the road. I've managed to accumulate a set that covers from 1992 to 2014 model years.
Lead Driver
Joined: Mar 2013
Posts: 7,460
Likes: 85
From: Kent Station, WA
Removing the battery and having it Load Tested at a local Autoparts store is a good start. I would also use a battery brush and clean the terminals from any corrosion. When at the Autoparts store of your choice grab a set of the felt anticorrosion pads red/green to go between the cables and battery.
Return with results.
Next step if battery passes would be testing the alternator. If battery fails replace.
Return with results.
Next step if battery passes would be testing the alternator. If battery fails replace.
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