BMW WDS - Wiring Diagram System
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  1. #1
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    BMW WDS - Wiring Diagram System

    BMW WDS - Wiring Diagram System can be found here. WDS BMW Wiring Diagram System - Model Selection
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  2. The Following User Says Thank You to Ronnie For This Useful Post:

    MartynD (23-04-2012)

  3. #2
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  4. #3
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    Quote Originally Posted by Ronnie View Post
    BMW WDS - Wiring Diagram System can be found here. WDS BMW Wiring Diagram System - Model Selection
    Hi Ronnie Thanks for the link. Unfortunately my laptop security settings wont let me operate it. I tried for two hours last noght but couldnt get around it. So I need to ask a favour.

    I drove to Bristol and back today, a round trip of 200 miles. THe cars heater would not heat up and it was bloody freezing so I pulled out the fuse that I had used to replace the broken on - Number 62. This is the fuse for the HCV. Heat immediately. It would seem that the default position for the HCV is fully ON but as soon as you send power to it, it closes to off. Something needs to "tell" it to open, and by how much. Im guessing this is the Cabin temp sensor. I also found out that when I installed a fuse to number 23 ( which was missing) NOTHING changed. So my conclusion is that whatever is on the end of fuse 23, it aint working. I need to know what this is.

    The favour I need to ask is for some kind person to take a look at the link provided and tell me what fuse 23 goes to. Also it would be useful to know if there is anything in-between the fuse and the "thing" such such as a resistor or anything that might have gone bang. Ive a feeling its either the HCV pump or the cabin temp sensor.

    So to summarise,

    HCV Powered up - Stone cold
    HCV not powered up - Bloody hot

    Nothing in between even though the blower functions as normal. When on AUTO The system thinks that it is working because when i dial in above 22 degrees the blower bar shows only 2 blocks whereas when I dial 16 degrees the blower lights up all the blocks and blows full blast.

    Many thanks.
    Last edited by Sabre46; 23-04-2014 at 13:13.

  5. #4
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    Have you ran any diagnostics?
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  6. #5
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