1994 bmw convertible top problem

Just follow the instructions:
http://www.pelicanparts.com/bmw/techarticles/101-Projects-75-Conv-Rear-Window/101-Projects-75-Conv-Rear-Window.htm

sell the vehicle unless you are willing to spend about 3000 to replace the adjusters that move the top up and down

It depends on how old your car is and the availability of spare parts in your area.

I am sorry we do not have wiring diagrams here at Fixya.

Take a look at this video of replacing the window lift regulator which of course requires removal of the door panel to access the regulator, it should give you the basic knowledge to locate the hidden screws you must remove to get the panel off.. LINK

Buy a electrical troubleshooting booklet, try and find one on eBay used.

you dont need to take the door off just the casing u need a workshop manual it will aways come in handy

If you hear a whining noise, you are probably low on fluid.
The pump/motor/reservoir combination is probably behind the rear seat.
Fill it with ATF with the top down. Cycle the top as much as possible, repeat till the reservoir accepts no more fluid in the down position.
Check lines and cylinders for leaks, replace/repair leaks.
If you hear nothing, check the fuse.
If that is good, hotwire the motor, if that works, check the switch.

I have a 325 convertible on a 93 .The roof will come up but wont come back down .Has any one got any idea which sensor it could be .

disconnected battery on 1994 lexus gs300, which belonged to a dead family member, do not have the reset code. how do I get it?