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7 Series - F01 / F02 (2009 - current)
The new re-designed 7 series F01 / F02 leads off the BMW Fxx chassis code!

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  #1  
Old 06-03-2012, 03:02 PM
dbs600 dbs600 is offline
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Power Rear Sunshades Question / Difficulty

If the rear window sunshade is already up, is there a way to raise the side rear door window sunshades without first having to lower the rear window sunshade from the sunshade button on the driverís door?
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Old 06-03-2012, 05:15 PM
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06Black550i 06Black550i is offline
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Not anymore. Just for backseat passengers' reach now. Was more independent in my '07. I lower rear shade slightly, then reverse direction midstream so sides raise. Probably damaging the electronic relay in the process!
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Old 06-03-2012, 05:20 PM
dbs600 dbs600 is offline
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Quote:
Originally Posted by 06Black550i View Post
I lower rear shade slightly, then reverse direction midstream so sides raise. Probably damaging the electronic relay in the process!
I do the same exact thing; also concerned for resulting damage, which is why I ask... :|
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Old 06-03-2012, 06:00 PM
chrischeung chrischeung is online now
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I would doubt that there would be any electronic damage. Otherwise wouldn't BMW program some logic to stop this, or even highlight this in the manual? I do the same thing with my car.
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Old 06-03-2012, 06:40 PM
dbs600 dbs600 is offline
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Definitely wears the motor and mechanism because of double, unnecessary use and reversing mid-stream. Otherwise, also annoying.

Last edited by dbs600; 06-03-2012 at 06:41 PM.
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Old 06-03-2012, 08:02 PM
chrischeung chrischeung is online now
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That I agree with. But isn't it designed for that? It's built to take it, and should last the life of the car, or at least, as long as any other motor in the car, like the seat motors. I honestly can't recall anyone having burnt out an electric motor on a BMW, say less than 10 years old. Electronics I hear about, but mechanical defects not caused by some external issue like water, I can't recall.

Isn't the biggest cause of DC motor burn out due to load resistance, and not in this case, probably a change in polarity? I also think that BMW has some control logic between cycles to stop any damage. They have the logic to stop the shade when it is fully extended or retracted for example. So perhaps there is a small "break" when you switch from one direction to the other. The button is definitely not connected directly to the motor, since all you need to do is depress the button for the rear shade, and hold longer for all shades.

Having said that - I leased my car.
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2012 ActiveHybrid 750i ED

3/12 ED 7 - thread ID 610350
1/11 ED 6 - thread ID 5767556&postcount=175
4/10 ED 5 - thread ID 453501
5/08 ED 4 - thread ID 290679
3/07 ED 3 - thread ID 201013
3/06 ED 2 - thread ID 136454

Last edited by chrischeung; 06-03-2012 at 08:27 PM.
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