355 Passenger door window

Klas, there are no electrics on the GTS which would stop the window 8mm from the top (other than the motor/regulator). Does the window speed on both windows seem to be the same?

Are there any rattles in the door? There are messages on the forum about broken guide rails. A weld is required to fix them. https://www.ferrarichat.com/forum/threads/how-to-fix-a-common-348-window-problem.107061/#post-135816942

(EDIT: Sorry, that was for the 348. I'm not sure if it applies to the 355. Here's a 355-specific thread:

https://www.ferrarichat.com/forum/threads/fix-for-355-drivers-door-rattle.59677/ )

Also make sure the guides are lubricated (perhaps a dry, powder lubricant would be best?).

 

Only the spider has dedicated microswitches. Here's the wiring diagram (I've added the spider window switches "03084" and "03085").

Ferrari F355 Fig10_Window_Control_5.2(1997~) Wiring Diagram

If the motor doesn't have internal (current sensing) circuits or clutch which controls the stopping at the end of travel, the only other component to stop the motor running would be the Window Control Unit next to the stereo control panel (under the dash). For the control unit, Google "Ferrari part 154769" (replaces P/N 155573)

https://www.eurospares.co.uk/parts/ferrari/355-52-motronic/bodywork-lighting/doors-glass-lifting-device-41129

 

There may be an alignment issue:

https://www.ferrarichat.com/forum/threads/looking-for-348-window-alignment-procedure.618399/#post-147093091

 

Have you tried applying 12 volts directly to the motor plug? If the window goes all the way up, the ECU is responsible for the window stopping and is faulty. If the window doesn't go all the way up, this will prove the ECU does not control the stopping of the motor.

 

This happened to my GTS. What had happened was the window electric mechanism cable guide sleeve had broken its inner door retaining clip. The sleeve gets caught between the the window and the window runners track at the front off the window. You need to remove the door trim and re attach the sleeve to the inner door frame

 

No sorry I just fixed it and put the door trim back on.

 

I took quite a lot of pictures when I refurbed the inards of my door if it helps including removing the lower panel

https://www.clubscuderia.co.uk/forum/showthread.php?45388-348-DIY-quot-Restoration-quot&p=771607#post771607

If your not interested in removing the lower panel just skip about 3 pages forward

 

Well, you've proven that there are no limit switches inside the motor/gearbox. Since there are no internal switches in the motor and there are no switches on the door frame or window mechanism (according to the diagrams), the motor can only be stopped by the pressure of the glass when it hits the top of the frame (or when it hits an obstruction).

This leaves two possibilities:
There is a clutch mechanism in the motor assembly that responds to pressure.
The ECU detects a change in the current of the motor when the glass hits the top (or an obstruction) and stops movement.

If no one offers a solution, I would put the motor mechanism back in the door and put 12 volts on the motor (as suggested earlier). If you're sure the glass moves easily in the guides and if the glass still stops 8mm below the top, then there must be something wrong with the motor clutch.

 

If you have the door open and the engine running will it go to the top then?

 

Good point. As the window is frameless, there must be some kind of "endstop" in the mechanism other than the car roof. Is this endstop adjustable? The endstop has to be separate from the motor/regulator as Klas' window kept winding until the glass came out of the track. There must be something in the door to stop movement.

 

I''s covered in more detail in the link I mentioned in Post #11 but as mentioned I took both the the inner panel off and the outer lower door panel then if you unplug the cable clip you can bring the window switch outside the car so you can operate teh window and watch what it does - MIND YOUR FINGERS!!!!!!

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The switch would still talk to the motor via the window ECU, so it still wouldn't prove if the ECU or motor/regulator was faulty, but, as you say, it's still a good idea to see what's happening when you operate the switch.

 

If you get hold of the front guide (use gloves as some bits are sharp) can you wiggle it to find any movement??

Here's a photo -I don't mean undo bolt as shown I'm talking about the black triangular piece to the right that guides the glass - try lubricating/cleaning the guide then loosening off that machine screw to see if that's stopping the window glass moving. (hope I have right end).

If it's the other end try loosening the 3 door screws that hold the black door sail and lubricating/cleaning the inner rubber guides.

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