Ok, I have a 2009 Ralliart and the battery is only a year old. Last week I went to go to work and the battery was dead enough to not start the car.. around 9 volts after sitting over night. I thought maybe I left a light on or didn't shut the door all the way, so I charged it. Next morning same thing, dead again. I charged it once more and then unhooked the battery. it no longer drains. With the battery hooked up its drawing over a tenth of a volt, which seems pretty significant for the car supposedly shut off. 12.48 unhooked and 12.35 hooked up with key off/ nothing on. The next step was to pull every fuse until I figured out where the draw was coming from. it ended up being the IOD ciruit. when I pull that there is now zero draw from the car. My question is, what is the problem ? I dont think its my battery, but who knows how do I check ? If its the IOD circuit drawing too much, how do I narrow that down and see what the issue is ?I know its supposed to draw some, but killing the battery in a day is bad. Any advice, tips, suggestions would be great, for now I'm having to unhook my negative terminal if im leaving my car sitting for more than like 4-5 hours..

 

Have you disconnected the battery after its been charged and left it over night to see if it keeps the charge first?
I'd also check the alternator to see if its sending a charge back to the battery.
do you have aftermarket audio equipment?
aftermarket accessories that are not connected to ignition source but maybe an always on source?

 

Yes I have been disconnecting the battery and the battery doesnt lose any voltage over night. and when car is running the system is over 14 volts so the ALT is working correctly. I Do have after market audio but it was installed over a year ago and the problem just started 2 weeks ago. I also pulled the fuse on that AMP until I figure out whats going on.

I'm thinking its either

1: Something in the IOD circuit is sucking way more juice than it should. ( but there are many parts to the IOD so it could be very complex to pinpoint) How can I check how much its pulling, measure amp draw ? anyone know what a working properly IOD circuit pulls when the car is off ?

2: The battery is going and losing a charge quicker than it should, so this minimal draw is looking like a big draw and killing my battery in a matter of hours if I leave it plugged in. ( but again, if I unplug it, it remains charged fully)

3: I'm completely clueless and its something else

 

Not my writeup, but I hope it helps.

Excessive IOD can be caused by:
• Electrical items left on.
• Faulty or improperly adjusted switches.
• Faulty or shorted electronic modules and compo-
nents.
• An internally shorted generator.
• Intermittent shorts in the wiring.
If the IOD is over twenty-five milliamperes, the
problem must be found and corrected before replac-
ing a battery. In most cases, the battery can be
charged and returned to service after the excessive
IOD condition has been corrected.
(1) Verify that all electrical accessories are off.
Turn off all lamps, remove the ignition key, and close
all doors. If the vehicle is equipped with an illumi-
nated entry system or an electronically tuned radio,
allow the electronic timer function of these systems
to automatically shut off (time out). This may take
up to twenty minutes.
(2) Disconnect the battery negative cable.
(3) Set an electronic digital multi-meter to its
highest amperage scale. Connect the multi-meter
between the disconnected battery negative cable ter-
minal clamp and the battery negative terminal post.
Make sure that the doors remain closed so that the
illuminated entry system is not activated. The multi-
meter amperage reading may remain high for up to
three minutes, or may not give any reading at all
while set in the highest amperage scale, depending
upon the electrical equipment in the vehicle. The
multi-meter leads must be securely clamped to the
battery negative cable terminal clamp and the bat-
tery negative terminal post. If continuity between the
battery negative terminal post and the negative cable
terminal clamp is lost during any part of the IOD
test, the electronic timer function will be activated
and all of the tests will have to be repeated.
(4) After about three minutes, the high-amperage
IOD reading on the multi-meter should become very
low or nonexistent, depending upon the electrical
equipment in the vehicle. If the amperage reading
remains high, remove and replace each fuse or circuit
breaker in the Integrated Power Module (IPM), one
at a time until the amperage reading becomes very
low, or nonexistent. Refer to the appropriate wiring
information for complete Integrated Power Module
fuse, circuit breaker, and circuit identification. This
will isolate each circuit and identify the circuit that
is the source of the high-amperage IOD. If the
amperage reading remains high after removing and
replacing each fuse and circuit breaker, disconnect
the wire harness from the generator. If the amperage
reading now becomes very low or nonexistent, (Refer
to 8 - ELECTRICAL/CHARGING - DIAGNOSIS AND
TESTING) for the proper charging system diagnosis
and testing procedures. After the high-amperage IOD
has been corrected, switch the multi-meter to pro-
gressively lower amperage scales and, if necessary,
repeat the fuse and circuit breaker remove-and-re-
place process to identify and correct all sources of
excessive IOD. It is now safe to select the lowest mil-
liampere scale of the multi-meter to check the low-
amperage IOD.
CAUTION: Do not open any doors, or turn on any
electrical accessories with the lowest milliampere
scale selected, or the multi-meter may be damaged.
(5) Allow twenty minutes for the IOD to stabilize
and observe the multi-meter reading. The low-amper-
age IOD should not exceed twenty-five milliamperes
(0.025 ampere). If the current draw exceeds twenty-
five milliamperes, isolate each circuit using the fuse
and circuit breaker remove-and-replace process in
Step 4. The multi-meter reading will drop to within
the acceptable limit when the source of the excessive
current draw is disconnected. Repair this circuit as
required; whether a wiring short, incorrect switch
adjustment, or a component failure is at fault.

 

^this. Do not measure voltage - but measure amperage draw (place the multi-meter in-line with the battery negative cable and use amperage connections and settings (different from measuring voltage across the battery terminals).

 

Also while alternators may output 14v and have good amps the internals can short and cause draw.

Like suggested before set your meter to amps and find a wiring diagram for the IOD circuit. Generally once you isolate the circuit you unplug stuff until the draw disappears.