battery dying after sitting 24hrs+ Help!! - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #26  
Old 02-23-2009
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I believe .022 is too much draw. With your DMM hooked up you could start pulling fuses till you find the draw.
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  #27  
Old 02-23-2009
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i'm going to do that tomorrow, just start pullin them in the fuse panel?
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  #28  
Old 02-23-2009
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http://www.wagoneers.com/XJ/tech/93-shop/PARASITI.pdf

Says max Ford parasitic draw is <.050 A. Your battery may be bad. .022 A is well within the max.

When I do a parasitic drain test, I latch the driver door (still open) so the dome light etc is fooled. Then I let it sit for about two beers (1/2 hr or so).

When you disconnect the neg battery terminal, you need 3 hands. Maintain contact neg terminal to post and meter leads to terminal and post. Do not let the meter leads become disconnected from the terminal and post while you DISCONNECT the terminal from the post. (That link shows the "disconnect tool" that accomplishes this task for you).

I suggest you REMOVE the battery and have it load tested. Those Optima batteries have a pretty checkered history of premature failure. I'm still a big fan of good old lead acid with a lot of CCA's, despite the weight.


Edit: Thanks, Bob /sanity check/

Last edited by Earl43P; 02-26-2009 at 07:47 AM.
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  #29  
Old 02-23-2009
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Quote:
Originally Posted by Earl43P View Post
http://www.wagoneers.com/XJ/tech/93-shop/PARASITI.pdf

Says max Ford parasitic draw is <.050 Vdc. Your battery may be bad. .022 Vdc is well within the max.

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Should be:

Says max Ford parasitic draw is <.050 AMPS. Your battery may be bad. .022 AMPS is well within the max.
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  #30  
Old 02-23-2009
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Quote:
Originally Posted by jamesxEDGE View Post
i'm going to do that tomorrow, just start pullin them in the fuse panel?
Yeah just start pulling (leaving the large fuses for last) one at a time. I'd start with the fuse panel.


^Best tool for Parastic draw tests. Jegs.com has them HERE.

Last edited by karrbass4life; 02-23-2009 at 02:55 PM.
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  #31  
Old 02-23-2009
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....and the fun begins! i'll update in a while guys. thank you
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  #32  
Old 02-23-2009
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May be just low cells in the battery. usually the simplest is the fix.
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  #33  
Old 02-23-2009
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alright went out and started pulling fuses, got to fuse 26 and the amps dropped to about .004, MUCH better.. so turns out that fuse 26 is Battery saver relay, Auxiliary relay box, Restraint Central Module (RCM), Generic Electronic Module (GEM), Instrument cluster... why would this be drawing power? and what can i do to save it from draining it completely?
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  #34  
Old 02-23-2009
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Dude, its that red top. I have changed 2 in 2 years. Upgrade to a yellow top and call it a day. Want to go a step further, get a 130 amp from the jy, that is if your truck does not already have one.
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  #35  
Old 02-23-2009
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dont have a red top, i think that was the original poster hahaha
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  #36  
Old 02-24-2009
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bumpity ^^
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  #37  
Old 02-24-2009
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I'd start with the easy stuff like those relays.
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  #38  
Old 02-24-2009
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Quote:
Originally Posted by n3elz View Post
I know the glove compartment light in mine isn't on the automatic 10 minute "battery saver" timer in my 2002. If the switch in there was bad, that could actually do it.

Amps that don't power off and so forth are a potential hitter.

If you don't have a digital voltmeter so you can tell us what your voltage readings are at rest and when charging, there's really not much we can suggest other than getting it tested.
you have a light in your glove compartment?! i wish i did
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  #39  
Old 02-24-2009
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Quote:
Originally Posted by karrbass4life View Post
I'd start with the easy stuff like those relays.
what do you mean? like i said i found the source of the draw i just don't know how or why it's drawing when everything is off
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  #40  
Old 02-24-2009
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could something like my battery saver relay be bad?
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  #41  
Old 02-25-2009
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The battery saver has to time out. IIRC it only takes about ten minutes (I hear mine click off while I wait for the wife, shopping; takes about 15 clues of a crossword puzzle. The only effect is I can't close the power windows after it times out.).

You should cheat the door shut by latching the door latch as if it were closed. Again, .022 A is WELL within the parasitic draw limits. Your problem is elsewhere - have the battery load tested.

Last edited by Earl43P; 02-26-2009 at 07:48 AM. Reason: Amps, not volts, duh!
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  #42  
Old 02-25-2009
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You don't look at Voltage with draw you look at Amperage.
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  #43  
Old 02-25-2009
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yeah, i was gonna say it should be amps.. well i'm going to go outside today and make sure it clicks off after sitting for an hour and see if my amps drop down at all. i also will have my battery load tested. i'll keep you updated
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  #44  
Old 02-25-2009
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Load test can kill a battery that otherwise would just need a charge.

Parasitic Draw Test How-To

There is a really good How-To, for checking Parasitic Draw. Just in case anyone should need it in the future.
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  #45  
Old 02-25-2009
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Okay, should I leave my truck off with the alarm on and let it sit for 40 minutes until the GEM is supposed to shutoff and all that bull**** turns off and THEN check my draw? I read somewhere that if the relay or something is stuck, it will drain the battery.
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