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Parasitic drag on battery....Need some help.

Old 09-11-2018, 07:23 PM
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Default Parasitic drag on battery....Need some help.

Hey all, got a 2012 fx4 5.0 litre with some troubles. Battery died on me a while back and seemed to be weak so i was considering a new one anyway and changed it. Day or so later it my truck would not start. Did some trouble shooting and found a circuit running thats connected to the PCM relay, i can hear something running so i found what circuit it was and removes the relay and noise goes away. I am hearing the sound around the transmission area mostly, sounds like a electric pump or fan running very faint but its there. Seems lile its on top of the transmission too but not sure . I was told maybe the airbag module which is in that area ..but need some help in locating the issue. Any ideas?
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Old 01-09-2019, 11:33 AM
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Any luck with this? I am having the same issue on my 2014 5.0.
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