I have a 1998 BMW M3 convertible. My convertible top was working but only to open half way and not fold all the way down. I used to be able to do the whole thing manually but now it won't even let me close it manually by cranking it. Do you have any ideas on how I can trouble shoot this?
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Do not know of a "Window Relay" for a 2-door M3 convertible. But there is a "Window motor to regulator" in the door itself.
However, there are two 30 amp fuses (#14 and #19) located in the plastic front power distribution box located in the left-hand rear corner (nearest the driver) of the engine compartment that I would check to see if this is your problem before digging down into door interior disassembly. The numbers are marked look under box cover.
I believe you do this in this order. Roll windows down, release the latch at the top of the windshield, raise the front of the top, release rear cover by pulling the latch near the rear seat, Pull up the back of the top and then pull up on the rear cover. The back of the top should now fit into the opening under the rear cover. Continue to fold the top into this space. Push down on the rear cover to lock (won't be able to open trunk if not engaged.) To raise it, release rear latch cover, open rear cover and pull top out of opening. Raise rear of top so you are able to now close the rear cover, set rear of top down on cover and then pull fron of top down and engage the fraont latch. Hoe that helps.
How about "soft-top covering" 54318412054 in black. Go to realoem.com and click :Enter" Put in the info for your car (I guessed). Find the section that has the part you want, "Folding Top Mounting Parts" for example. http://www.realoem.com/bmw/showparts.do?model=CH33&mospid=48094&btnr=54_0194&hg=54&fg=10