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Old 10-16-2011, 06:01 PM   #15
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the battery check as mentioned is something to check too. the easiest way is to leave the battery disconnected for a few days and check the voltage daily and see if it drops all on its lonesome. don't forget to rinse off the top of the battery. surface grime can draw the battery down too.
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Old 10-16-2011, 06:52 PM   #16
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The I.O.D. fuse is the Ignition-Off Draw fuse. It is supposed to include a snap-in retainer that allows the fuse to be disconnected without removing it from the fuse block.
why? I foresee being quite annoyed if I ever need to actually change it. What's the point of this gizmo?

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Check the electronic shift transfer case to make sure it isn't drawing power, like it's trying to shift range when you're not running the truck.

So sayeth the Owner's Manual.
I didn't see it sayeth that anywhere in the owner's manual.

This one has a stick shift...and I know that there's vacuum involved somewhere in there (front hubs). don't recall seeing a fuse that was marked as having anything to do w/ the transfer case.
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Old 10-16-2011, 07:09 PM   #17
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why? I foresee being quite annoyed if I ever need to actually change it. What's the point of this gizmo?



I didn't see it sayeth that anywhere in the owner's manual.

This one has a stick shift...and I know that there's vacuum involved somewhere in there (front hubs). don't recall seeing a fuse that was marked as having anything to do w/ the transfer case.
My comments were direct quotes from my owner's manual from my Ram 1500,chapter 7, page 289, "Vehicle Storage". The manual recommends pulling the IOD fuse if you are going to store the truck for 21 or more days, and place the transfer case selector in 2H to keep the transfer case from draining the battery. It also suggests disconnecting the battery.


On edit, it looks like your truck is a 2000, mine is an '02, and the models may be different, along with the manuals...
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Old 10-16-2011, 07:24 PM   #18
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4.5 does not seem to be way out of line IMHO.

I would have expected it to be higher with your drain time frame. I like richinny's idea so let the battery sit disconnected to see if it is dropping on it's own.

Best to use a digital meter so you can monitor the fall accurately.
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Old 10-17-2011, 07:20 AM   #19
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doesn't seem like much...if I have the meter set right.

it looks like this:




I know, it "could" be the battery, itself, but what do you suppose the odds are of buying a battery that goes bad prematurely, and having it placed with another one, that also goes bad within a few months. ??
doesn't that seem rather unlikely?

(fwiw, my owner's manual is a little different than the one Terry was referencing. no mention of the transfer case in the "long term storage" advice; it does mention to pull the IOD fuse, but thats it. )
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Old 10-17-2011, 12:35 PM   #20
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Terry mentioned already....

Even though the alternator isn't warm, I would try disconnecting the positive wire.

Seen many diode packs fail..

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Old 10-17-2011, 03:04 PM   #21
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I disconnected it from where it connects to the pdc; no change in the draw from the battery.
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Old 10-17-2011, 03:28 PM   #22
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One other thing to try
See if you can turn the alternator pulley with your hand, or use a socket and see if it turns easily. A worn belt will look OK at a casual glance, but won't drive the alternator under load.
You should not be able to turn the alt pulley with the belt on without quite a bit of force.
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Old 10-17-2011, 06:20 PM   #23
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alternator is working fine. Its putting out 14+ volts.

Running the vehicle on a daily basis is what keeps it from going completely dead.
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Old 10-17-2011, 06:26 PM   #24
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Disconnect the - battery cable tonight and measure the voltage. In the morning before reconnecting it check the voltage again. If the battery is good there should be very little drop. Worth a try.
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Old 10-17-2011, 06:46 PM   #25
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1st on most meters to read amps the pos (red) lead is plugged into the A (amps) socket and not the ohms, DC voltage socket. The neg(black) is in the ground socket.

Have you checked the truck bed light?
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Old 11-15-2011, 04:09 PM   #26
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Chuck..... Did you solve your drain problem???
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Old 11-15-2011, 04:59 PM   #27
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Alternator failure

Quite often a sudden or new drain like this is due to a failed/ failing alternator. Yes it might be putting out 14 or more volts, but the rectifier/ diode pack might be bad allowing voltage to flow through the alternator while off asting as a drain and ultimately killing the battery.
A simple check is to remove the negative lead to the battery. Insert a test light between ground and the cable. If the light lights, there is a load somewhere. Check the alt circuit by unplugging all the connectors. If the light goes out, there is your drain. If not, check all the other circuits bu pulling fuses. When you come to one where the light goes out, you have found the drain. Nothing like clock, radio memory, ECMs, etc should pose a drain sufficient enough to light the light!

My money is on the alternator!

Good luck!
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Old 11-15-2011, 07:41 PM   #28
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Quote:
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Terry mentioned already....

Even though the alternator isn't warm, I would try disconnecting the positive wire.

Seen many diode packs fail..

Bob
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I disconnected it from where it connects to the pdc; no change in the draw from the battery.
I think Chuck has been there done that.

Bob
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