2003 530i with standard trans.
Before I get flamed for re asking this question, Ive searched everywhere possible and get the same wrong answer over and over. I have replaced the final stage with three different units. Also I have checked continuity from the control head to the final stage. The problem I am having is that the controls went out, as well as the fan continues to run after the car is shut off. I have a constant 5 volts that seems to rise slowly to 8 volts from the head to the final stage on the small wire that controls fan speed. I do not have any BMW diagrams that can tell me what a normal base voltage for this is. Any support or links that may help me would be greatly appreciated. I am a professional mechanic so speaking to me in technical terms is not a problem. Thanks for any support.
Also you can still turn the radio on with the doors open and the key out. haven't noticed any other "quirks" yet.
Before I get flamed for re asking this question, Ive searched everywhere possible and get the same wrong answer over and over. I have replaced the final stage with three different units. Also I have checked continuity from the control head to the final stage. The problem I am having is that the controls went out, as well as the fan continues to run after the car is shut off. I have a constant 5 volts that seems to rise slowly to 8 volts from the head to the final stage on the small wire that controls fan speed. I do not have any BMW diagrams that can tell me what a normal base voltage for this is. Any support or links that may help me would be greatly appreciated. I am a professional mechanic so speaking to me in technical terms is not a problem. Thanks for any support.
Also you can still turn the radio on with the doors open and the key out. haven't noticed any other "quirks" yet.