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Parasitic Loss Issue - TCM will not sleep


Linc
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I am experiencing a parasitic loss issue that is draining the battery.  The dealer changed out my passenger

air bag on the recall and gave me the car back with this issue. They spent days trying to solve the problem

but then just gave it back and said "we didn't cause this issue".

 

What I have found is that fuse 16 from the BJB has about a 1 amp draw on it when the car is off and you

can hear a ringing sound from the TCM.  Pulling the fuse kills the draw and silences the ringing sound. But 

does not entirely eleviate the parasitic loss. 

 

I have a couple of codes about network commutation and I think this is likely more of a cause than a

symptom.  Does anyone have a pinpoint test for this?

 

I have to note after the dealer changed out the SJB about a year and a half ago I had this same probem

but it resolved itself before I could find the problem. This leads me to believe the dash harness may be

involved in the problem since both service items involve that main harness.  Also the old threads about

my sport shifter problem also point to this harness.

 

Thanks for the help.

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