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  #31  
Old 03-21-2019, 05:34 AM
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well update, not the TCU, pulled the fuse on it, 3-4days no driving, battery voltage down to 9.45v will look into the FSR
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  #32  
Old 03-21-2019, 10:06 AM
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AS this drags on, I am betting on a aftermarket radio part "upgrade fail. If not, a 15 year old radio/phone/amp failure.
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  #33  
Old 03-26-2019, 09:59 AM
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sorry if this dragged on, this seemed to be the only thread that has been active in the last couple of months. But no aftermarket bodged installs, all OE kit, tv, phone, cd, nav all functioning normally. pulled out FSR to double check model numbers, put back in, did a parasitic drawer once current stabilised after computer shut down drawing 0.02 which seems negligible to me, nothing changed pulling fuses and relays. Don't worry I won't let it drag on, ill look for answer elsewhere.
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  #34  
Old 03-26-2019, 10:22 AM
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You are on the right path.
Question: Try turning on all the power drain (radio, heaters, blowers, etc) then let it shut down as one or two may stay on once in a while.
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #35  
Old 03-26-2019, 10:28 AM
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On a second thought, Pull the auto alarm fuses and see what happens.
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #36  
Old 03-26-2019, 11:06 AM
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What about the power drawn by the light sensor in the grid by the TPS, DSC, etc. switches? Does it sample light in the cabin constantly but if so could it produce enough of a drain to cause these faults and keep the system from sleeping?

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  #37  
Old 03-26-2019, 02:06 PM
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20mA is not going to drain a battery you are describing classic example of self drain. Especially if a battery was ever left for a period of time at a state of deicharge, it will set up a condition where it is shorted out inside between the plates and will drain all by itself.

You can confirm by charging the battery leave it disconnected then measure the voltage after a day or three.
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