Window switch block + mirrors not working

shivo979 · 12-29-2023, 11:18 PM

Vehicle: 2014 BMW 328d XDrive

Bit of a long story here...

Installed a new m-sport steering wheel on my non-msport BMW. Job took a few hours, with the battery disconnected. After re-connecting the battery, car would not start without a boost. I ended up replacing the battery with a new one, car starts and runs fine.

My driver side door lock actuator has also been broken by itself few weeks ago and I have just got some time over the holidays to replace it with a new actuator from China (Amazon). After replacing the door lock actuator, my door was unlocking and locking fine, until I realized the driver side window switch block and the driver side mirror were not working as expected. The whole block was not lit up as it should be. I then realized that the door lock actuator was not working as well, possibly relating to the same issue.

I unplugged the new actuator, and plugged the power to the old one, and the window switch block was still not working. I checked every single fuse in 3 separate fuse boxes/locations (battery, under trunk mat, front passenger, and engine compartment fuse box) and none were blown. I then got my brother to code in my new battery to my car, and there was no change.

My issue is that my driver window was fully rolled down, and it will not roll up anymore. Even with I hold down the lock button on the fob, it won't roll it up. Gotta keep the car in the garage to prevent theft.

At this point I am stumped as to what may be causing this issue. I plan to take it to the mechanic to see if they can fix this dumb issue. I do understand that I bought a cheap chinese part which is not recommended, but I don't believe that is causing my window switch block to not work.

Any ideas ?

sspade · 12-30-2023, 04:41 PM

The correct fuse is definitely under the hood, passenger side, under windshield cowl. I’d check again for a blown 7.5 amp mini fuse (brown).

I’ve had to replace mine several times for the drivers door window/mirror control block going dead. No idea why but sure enough, this fuse is blown every time it stops working. Probably happened about three times now since I’ve owned the vehicle.

fe7565 · 12-30-2023, 11:21 PM

F22 is the fuse for the switch block.

But it seems too easy. If it's not that fuse then fuses F4 (passenger) and F6 (driver) are for the window motors. Check also F5 and F7 (door lock motors). F4-F7 are in the FEM. This is my bet.

Can check also F504 (rear fuse box, but this one should be fine) and F57 (engine bay).

I would pull the fuse and ohm it out (except F504), not measure in place,

shivo979 · 12-31-2023, 10:51 AM

ahhhh it turned out to be a loose connection to the master window switch. The connector was locked it multiple times, but it seems like I need to push it in fully before locking in the connector. I thought pushing it in most of the way, the locking of the connector would fully seat it, but I guess not.

Now to understand why the door lock actuator is not functioning as it should ! Its clicking when I lock/unlock it, but nothing is happening. The manual key lock is not doing anything either. Probably something to do with how I re-assembled it after taking it all apart. Lesson learned, take it to a mechanic next time (face palm)

Appreciate the support !

fe7565 · 12-31-2023, 01:47 PM

Glad you solved it. Thanks for posting. Hope you find the solution for the rest too.

12-29-2023, 11:18 PM	#1
shivo979 Registered 0 Rep 2 Posts Drives: 2014 BMW 328D Sedan Join Date: Dec 2023 Location: Toronto, ON iTrader: (0)	Window switch block + mirrors not working Vehicle: 2014 BMW 328d XDrive Bit of a long story here... Installed a new m-sport steering wheel on my non-msport BMW. Job took a few hours, with the battery disconnected. After re-connecting the battery, car would not start without a boost. I ended up replacing the battery with a new one, car starts and runs fine. My driver side door lock actuator has also been broken by itself few weeks ago and I have just got some time over the holidays to replace it with a new actuator from China (Amazon). After replacing the door lock actuator, my door was unlocking and locking fine, until I realized the driver side window switch block and the driver side mirror were not working as expected. The whole block was not lit up as it should be. I then realized that the door lock actuator was not working as well, possibly relating to the same issue. I unplugged the new actuator, and plugged the power to the old one, and the window switch block was still not working. I checked every single fuse in 3 separate fuse boxes/locations (battery, under trunk mat, front passenger, and engine compartment fuse box) and none were blown. I then got my brother to code in my new battery to my car, and there was no change. My issue is that my driver window was fully rolled down, and it will not roll up anymore. Even with I hold down the lock button on the fob, it won't roll it up. Gotta keep the car in the garage to prevent theft. At this point I am stumped as to what may be causing this issue. I plan to take it to the mechanic to see if they can fix this dumb issue. I do understand that I bought a cheap chinese part which is not recommended, but I don't believe that is causing my window switch block to not work. Any ideas ?
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12-30-2023, 04:41 PM	#2
sspade Major General 2469 Rep 5,458 Posts Drives: F30 Join Date: Oct 2017 Location: Stevenson, WA iTrader: (3) Garage List 2016 BMW 320i [7.87] 2014 BMW 328i [6.83]	The correct fuse is definitely under the hood, passenger side, under windshield cowl. I’d check again for a blown 7.5 amp mini fuse (brown). I’ve had to replace mine several times for the drivers door window/mirror control block going dead. No idea why but sure enough, this fuse is blown every time it stops working. Probably happened about three times now since I’ve owned the vehicle.
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12-30-2023, 11:21 PM	#3
fe7565 Lieutenant Colonel 557 Rep 1,593 Posts Drives: 2012 BMW 328i N26 Join Date: Nov 2013 Location: United States iTrader: (0)	F22 is the fuse for the switch block. But it seems too easy. If it's not that fuse then fuses F4 (passenger) and F6 (driver) are for the window motors. Check also F5 and F7 (door lock motors). F4-F7 are in the FEM. This is my bet. Can check also F504 (rear fuse box, but this one should be fine) and F57 (engine bay). I would pull the fuse and ohm it out (except F504), not measure in place, __________________ Help each other: if you manage to fix your issue (especially with help from this forum), don't be a dck and disappear. Follow-up by posting the solution so you can help others. Last edited by fe7565; 12-30-2023 at 11:49 PM..*
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12-31-2023, 10:51 AM	#4
shivo979 Registered 0 Rep 2 Posts Drives: 2014 BMW 328D Sedan Join Date: Dec 2023 Location: Toronto, ON iTrader: (0)	ahhhh it turned out to be a loose connection to the master window switch. The connector was locked it multiple times, but it seems like I need to push it in fully before locking in the connector. I thought pushing it in most of the way, the locking of the connector would fully seat it, but I guess not. Now to understand why the door lock actuator is not functioning as it should ! Its clicking when I lock/unlock it, but nothing is happening. The manual key lock is not doing anything either. Probably something to do with how I re-assembled it after taking it all apart. Lesson learned, take it to a mechanic next time (face palm) Appreciate the support !
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12-31-2023, 01:47 PM	#5
fe7565 Lieutenant Colonel 557 Rep 1,593 Posts Drives: 2012 BMW 328i N26 Join Date: Nov 2013 Location: United States iTrader: (0)	Glad you solved it. Thanks for posting. Hope you find the solution for the rest too. __________________ Help each other: if you manage to fix your issue (especially with help from this forum), don't be a d*ck and disappear. Follow-up by posting the solution so you can help others.
	Appreciate 0 Quote