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Thread: 850 CSi drain battery + cluster problem.

  1. #26
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    This is what you would expect for a car that hasn't moved in 10 years - I'm surprised you don't have other problems!

    Right, to summarise:

    You've swapped out ALL the fuses with after-market ones - have you swapped them back?
    You've swapped ALL the relays in the trunk for different-coloured ones from BMW - is that right?
    You have flickering on the MID - is that still there?
    Electrolytic capacitors all replaced in the GM
    Your Odometer and you gauges don't work when the engine is running - is this correct?
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  2. #27
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    Quote Originally Posted by Timm View Post
    This is what you would expect for a car that hasn't moved in 10 years - I'm surprised you don't have other problems!

    Right, to summarise:

    You've swapped out ALL the fuses with after-market ones - have you swapped them back?
    You've swapped ALL the relays in the trunk for different-coloured ones from BMW - is that right?
    You have flickering on the MID - is that still there?
    Electrolytic capacitors all replaced in the GM
    Your Odometer and you gauges don't work when the engine is running - is this correct?

    All fuses back to orginal ones.
    The relays are new from bmw yes.
    The flickering is not there always.
    Caps replaced.
    The odometer and the gauges works when the car is running but not always. If the gauges dont work the odo meter dont work and the other way around.

    It seems like when i have the ctek hooked up to the car the cluster works fine. Like it gets enough power for the cluster. Can there be a component in the car that drains power so the instrumentcluster dont get enough power?

  3. #28
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    Where are you connecting the CTek? Engine bay or at the battery ?

  4. #29
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    Quote Originally Posted by Omega man 1969 View Post
    Where are you connecting the CTek? Engine bay or at the battery ?
    Engine bay

  5. #30
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    Ok well then you may have an issue with the power cables coming from the trunk. Have you checked the inline fuses hidden in there? If the Ctek was connect at the engine bay that would bypass any issue with the inline fuses and give stable power to the dash components.

  6. #31
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    Quote Originally Posted by Omega man 1969 View Post
    Ok well then you may have an issue with the power cables coming from the trunk. Have you checked the inline fuses hidden in there? If the Ctek was connect at the engine bay that would bypass any issue with the inline fuses and give stable power to the dash components.
    The big fuse is good, or atleast it dosent look broken. And the " glasfiber 50 amp " ive swapped to another one.


    By the way, a question about the climate control panel. When i turn up the fan speed on the wheel i need to turn it down to 0 or the fan will stay on even if i pull out the key and close the door. Should it be like that or should the fan stop blowing as soon as i turn of the key?

  7. #32
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    The fan should stop when you turn off the ignition.

  8. #33
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    ....and that means the IHKA controller is not sleeping - try disconnecting that and measure the current drain....

    Sent from my SM-G935F using Tapatalk
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  9. #34
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    Quote Originally Posted by Timm View Post
    ....and that means the IHKA controller is not sleeping - try disconnecting that and measure the current drain....

    Sent from my SM-G935F using Tapatalk
    Ok, but is it the fan sword that is the problem when the fan stays on?

  10. #35
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    Unfortunately that is quite normal - those resistors do get hot and go brown as does the back of the PCB. Has the current drain gone?
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  11. #36
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    Quote Originally Posted by Johanswe View Post
    Ok, but is it the fan sword that is the problem when the fan stays on?
    The fan should not be able to run unless the ignition key is in RUN or START - so could it be the ignition switch that is the problem? Disconnecting the RED multi-way connector at the ignition switch would prove that one way or the other - switch can be reached as per here:

    https://www.meeknet.co.uk/e31/wheel/...Wheel_Swap.htm

    The fact that your fan can run with the ignition OFF really helps track down this current drain - it is a simple observation that points us in the right direction!
    Last edited by Timm; 07-12-2018 at 05:07 PM.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  12. #37
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    Quote Originally Posted by Timm View Post
    The fan should not be able to run unless the ignition key is in RUN or START - so could it be the ignition switch that is the problem? Disconnecting the RED multi-way connector at the ignition switch would prove that one way or the other - switch can be reached as per here:

    https://www.meeknet.co.uk/e31/wheel/...Wheel_Swap.htm

    The fact that your fan can run with the ignition OFF really helps track down this current drain - it is a simple observation that points us in the right direction!
    Do you mean the red big wire? Disconnected that and nothing happened. Same with the IHKA box and the fan sword. Still at 0.39 and goes down to 0.19 when i pull fuse 1 in engine bay...

  13. #38
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    No, I mean the red multi-way connector that connects to the back of the ignition switch. You have parts of the car live when the ignition is off - pulling the connector off will determine if the ignition switch is at fault.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  14. #39
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    Quote Originally Posted by Timm View Post
    No, I mean the red multi-way connector that connects to the back of the ignition switch. You have parts of the car live when the ignition is off - pulling the connector off will determine if the ignition switch is at fault.
    This one?

    Attachment 633738Attachment 633739

  15. #40
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    That's the one - what's happened to it, what's all the tape?
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  16. #41
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    Quote Originally Posted by Timm View Post
    That's the one - what's happened to it, what's all the tape?
    Crime sceen from a DEFA alarm/immobilizer

  17. #42
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    With that disconnected does your fan still run?
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  18. #43
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    Quote Originally Posted by Timm View Post
    With that disconnected does your fan still run?

    Yes. Think i will try replace the BUZ things in the sword. But what else can cause the drain? Ive tried to pull the door modules but then the car wont go to sleep...

  19. #44
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    It's not a sleep problem - the Sword should not have power when the ignition is switched off.

    Your problem is that circuits that are normally disconnected by the ignition switch are still live. This is why I asked you to disconnect the multi-way connector at the back of the ignition switch - if the current went down then we could definitely say the ignition switch is the problem.

    But, my thoughts now are that something has been added to your car that is causing the problem - an alarm, aftermarket HiFi, something like that. My interest was peeked by the mess around the multi-way connector - it is that sort of fiddling that could cause your problem. So, to reiterate:

    Your problem is not a sleep problem
    Your problem is that parts of the electrical system that is normally disconnected by the ignition switch are still live
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  20. #45
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    Quote Originally Posted by Timm View Post
    It's not a sleep problem - the Sword should not have power when the ignition is switched off.

    Your problem is that circuits that are normally disconnected by the ignition switch are still live. This is why I asked you to disconnect the multi-way connector at the back of the ignition switch - if the current went down then we could definitely say the ignition switch is the problem.

    But, my thoughts now are that something has been added to your car that is causing the problem - an alarm, aftermarket HiFi, something like that. My interest was peeked by the mess around the multi-way connector - it is that sort of fiddling that could cause your problem. So, to reiterate:

    Your problem is not a sleep problem
    Your problem is that parts of the electrical system that is normally disconnected by the ignition switch are still live
    Ive removed the alarm and connected all cables back that were cut for the alarm. I cant see anything else that are added to the car. The car still drain battery even if i disconnect the multi way connector. From what i read if the sword got a bad component the fan will still run even if u pull out the key.

  21. #46
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    No, as I explained earlier, the fan only should get power in RUN or START - here's the corresponding page of the circuit diagram:

    https://www.meeknet.co.uk/e31/e31_95.pdf#page=519

    What you will probably find is that the blower relay is energised, and F19 is live with the key out of the ignition. That is not normal!
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  22. #47
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    The fan stops blowing when i disconnect the contact

  23. #48
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    If your fan stops when you disconnect the multi-way connector for the ignition switch AND the ignition is switched OFF - then your ignition switch has failed.
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  24. #49
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    Timm is stating basic electrical principals,
    AND he has supplied the actual circuit diagrams,
    you won't receive better than that,
    listen and learn.

  25. #50
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    Quote Originally Posted by Timm View Post
    If your fan stops when you disconnect the multi-way connector for the ignition switch AND the ignition is switched OFF - then your ignition switch has failed.
    Fan is still on when i unplug that contact, i can even start the fan without the ignition on/ multi contact disconnected.

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