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E85 / E86 Z4 (2003-2008)
E85 Z4 convertible and E86 Z4 coupe talk with our BMW gurus here.

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  #1  
Old 06-08-2014, 03:50 PM
vernon1 vernon1 is offline
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soft top wiring

i have a 2006 z4 top will not go down. windows lower top unlatches ten nothing. need a wiring diaram on top to be able to fix problem. was told by previous owner stoped working when in a fender bender.
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  #2  
Old 06-08-2014, 04:43 PM
bimmertech113 bimmertech113 is offline
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You need a top motor. I can help anyone out with this, that is anywhere near the Nashville tn area.


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Old 06-10-2014, 08:00 PM
rsutoratosu rsutoratosu is offline
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yeah i think the guy lied to you..
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  #4  
Old 06-11-2014, 01:41 PM
vernon1 vernon1 is offline
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reply to answer

thanks for your reply but i couldn't find the wirring diagram if you sent one. with out looking at a wirring diagram i'm not sure but i beileve it wouldn't be the top motor as it is unlatching and can be put down manually.i would think it would be a switch or wirring between the top motor and hydraulic pump or the pump.Anyone with a wirring diagram or knowlege of conditions needed to get power to pump please let me know.also info on how to access the pump itself would be helpfull.
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  #5  
Old 06-11-2014, 04:59 PM
bimmertech113 bimmertech113 is offline
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When I say top motor, I mean the hydronic pump/motor assembly that's usually underwater.


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  #6  
Old 06-11-2014, 06:54 PM
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dc_wright dc_wright is offline
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Quote:
Originally Posted by vernon1 View Post
thanks for your reply but i couldn't find the wirring diagram if you sent one. with out looking at a wirring diagram i'm not sure but i beileve it wouldn't be the top motor as it is unlatching and can be put down manually.i would think it would be a switch or wirring between the top motor and hydraulic pump or the pump.Anyone with a wirring diagram or knowlege of conditions needed to get power to pump please let me know.also info on how to access the pump itself would be helpfull.
There are two motors in the top assembly. One motor operates the front latches and the other drives the hydraulic pump that lowers and raises the top. Your latch motor is running, but your main motor isn't. While its possible its a wiring issue, what you've described is the classic symptom of failure of the main motor due to water intrusion. If you search this and other Z4 forums you'll find almost no if not zero cases where it was a wiring issue, and almost 100% top motor failure. Have you checked and cleared the drains for the top storage area? If they've never been cleared out, that adds to the probability of main top motor failure.....
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Old 06-11-2014, 07:59 PM
bimmertech113 bimmertech113 is offline
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Originally Posted by dc_wright View Post
There are two motors in the top assembly. One motor operates the front latches and the other drives the hydraulic pump that lowers and raises the top. Your latch motor is running, but your main motor isn't. While its possible its a wiring issue, what you've described is the classic symptom of failure of the main motor due to water intrusion. If you search this and other Z4 forums you'll find almost no if not zero cases where it was a wiring issue, and almost 100% top motor failure. Have you checked and cleared the drains for the top storage area? If they've never been cleared out, that adds to the probability of main top motor failure.....

I'm glad I'm not the only one that knows what's going on. If anyone is interested, I can do z4 top hydronic motor replacements for under a grand, parts and labor, for anyone that can be in the Nashville tn area. I use all bmw parts so you get a 2 year unlimited milage warranty.


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