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Old 10-14-2019, 12:59 PM
ATCBMW ATCBMW is offline
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Ampere draw on 2005 Z4 3.0

Does anyone know how many amp's are drawn with car asleep on 2005 3.0. Had a parasitic battery drain which was pulling 1.55 amps. 3rd tail light leaked and I had water in the battery compartment. Radio quit working so I am pretty sure radio amplifier is fried. Since radio didn't work I pulled the 7.5 and 10.0 fuses associated with it. I still have a 0.55 amp draw which seems high. Figured with car asleep it should only be around 0.05 amp or in that neighborhood. I do have yellow ABS and DTC light on but just replaced battery. Thanks for your help in advanced.
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Old 10-14-2019, 01:30 PM
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Doug Huffman Doug Huffman is offline
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Closed circuit current (what BMW calls properly off current) is probably about 20 mA, 0.02 Amps but does vary with equipment and platform.

newTIS.infobeta
Home / BMW E85 Z4 3.0i Roadster / Wiring Diagrams and Functional Description / Power train / Voltage and current control / Voltage and power supply / Standby current / Closed-circuit current measurement

https://www.newtis.info/tisv2/a/en/e...urrent/XPSPyxk
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Last edited by Doug Huffman; 10-14-2019 at 01:34 PM.
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Old 10-14-2019, 10:01 PM
Andyz4 Andyz4 is offline
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.55 A is high, have you tried pulling fuses one by one until it drops.
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Old 10-15-2019, 05:55 AM
ATCBMW ATCBMW is offline
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Thanks folks for the help/information

Pulling or checking each fuse is my next plan
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Old 10-15-2019, 08:57 AM
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Doug Huffman Doug Huffman is offline
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Quote:
Originally Posted by ATCBMW View Post
Pulling or checking each fuse is my next plan
Pulling fuses is not required by BMW Advanced Technical Diagnosis. I have posted it and / or the fuses excerpt a number of times. See Current Draw Diagnosis page 216
Attached Files
File Type: pdf Advanced Vehicle Diagnosis - 07-2013.pdf (7.14 MB, 17 views)
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Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.

Last edited by Doug Huffman; 10-15-2019 at 08:59 AM.
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