2009 Dodge Avenger Questions

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I have a 2009 dodge avenger and recently the battery went dead, so I got a new battery and didn`t use the car two days, and next day the battery was dead. I found in the forums it was a problem with a high battery drain when the car was parked, so I disconnected the negative cable of the battery and measured 1.5 amps to the ground with everything turned off in the car, so I proceed to pull out one fuse at a time, and one the fuses (7) of the unit labeled "IOD sense 1" stopped the drain. So I put back the fuse and used a lamp instead the meter and it turned on mid bright with a small variation; then I proceed again to take one fuse at a time and when I pulled the radio fuse (20) the lamp started to blink slowly with no variation in brightness and continued for over 20 minutes without change. So I pull out the radio (which is working fine) without any change.
I have no idea what to do next, I checked lights, mirrors, AC and everything works fine.
I certainly would appreciate any ideas, I refuse to take it to the agency because the cost and the time they will hold it.

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How long have you had this problem? a few months
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