Tuscan S wavy dash passenger window switch

[The Red Baron]

Hi all. The passenger window switch on my wavy dash Tuscan seems to have an issue: the up button isn't working and there's no tactile click when pressing it. The back lights on the passenger window buttons remain on and the door knob back light is constantly glowing amber, indicating an issue.

At the moment I can't get the passenger window up, so the car is not secure, nor can I leave it off the battery charger for too long, as the window switch lights are on all the time.

Does anyone know if there's an easy fix, or where to get a replacement switch? Am I right in the unit also being used in the T350 or Sagaris?

Cheers.

[Adrian@]

I have to presume that on the back of the passenger foot well wall will be a midi fuse (on my Tamora it is an 80 amp) and I would get a 8mm screw driver socket and remove that fuse for a few seconds and replace it, prior to resetting the windows on the alarm remote. A@

[Adrian@]

Again I have to presume here, but my understanding is that all the Tuscans retain the Bosch window motor but with a later version of the encoder (that matches the window motor system to the later wiring/switches) so this might be an encoder issue.
Which is 'better by design' and enclosed/integral to the SME motor on the Tamora (not on very early MK1's Tamora as they run the Bosch) /T350/Sag. A@

[Gladers01]

The Red Baron said:

Hi all. The passenger window switch on my wavy dash Tuscan seems to have an issue: the up button isn't working and there's no tactile click when pressing it. The back lights on the passenger window buttons remain on and the door knob back light is constantly glowing amber, indicating an issue.

At the moment I can't get the passenger window up, so the car is not secure, nor can I leave it off the battery charger for too long, as the window switch lights are on all the time.

Does anyone know if there's an easy fix, or where to get a replacement switch? Am I right in the unit also being used in the T350 or Sagaris?

Cheers.

Under the passenger shelf undo the 2 allen screws and lower the carpet down to reveal the door/window Ecu and unplug the multi block connector for a minute (the lights should go off) and then reconnect and try again, if this doesn't work swap the module with the driver's side Ecu situated behind a flap to the right of the pedal box and use this to test/close the window, also check the boot button is still working as this is usually powered by the passenger Ecu. I'm not sure if the T350 or Sag modules are compatible as the Tuscan window requires such a long downwards travel to clear the hockey stick.

Good luck with that old chestnut!

[The Three D Mucketeer]

The Red Baron said:

Hi all. The passenger window switch on my wavy dash Tuscan seems to have an issue: the up button isn't working and there's no tactile click when pressing it. The back lights on the passenger window buttons remain on and the door knob back light is constantly glowing amber, indicating an issue.

At the moment I can't get the passenger window up, so the car is not secure, nor can I leave it off the battery charger for too long, as the window switch lights are on all the time.

Does anyone know if there's an easy fix, or where to get a replacement switch? Am I right in the unit also being used in the T350 or Sagaris?

Cheers.

Does Alarming the car sort out the problem ? Usually does with mine, as a way of cancelling the flashing console light
The Window ECU works by counting the cog turns on a gear and easily gets screwed up.
However if the window still is on the open position , besides the encoder , I would also suspect a broken wire in the wiring though the door, and then a motor problem . Remove the door card you can and circuit test or do want I do ...... Take it to Heath @ XWorks

[Granturadriver]

The following would apply to T350, Tamora and Sagaris:

It could be a problem with the pushbutton itself. It is said to get stuck sometimes. This has sometimes been solved by spraying. The best thing would probably be to remove the switch unit once. However, you could also try spraying WD 40 into the switch. However, please verify again which agent is suitable.

It could be a problem with the door control unit. The easiest way to find out is to replace the control units on the passenger side and driver's side. If the fault moves to the other side, it is the control unit.

Then it could also be the window servomotor. However, I would rather assume that it would simply give up and is not still making itself felt through bam push-buttons.

Regarding the interpretations of the lights you could ask Paul Smith (ps-solutions) if this indicates a specific fault.

[Adrian@]

I like the idea of swapping the control boxes across the car...along with setting the alarm, Keith mentions counting cogs which would point me off to the later version of encoder with Bosch motors, which then matches the wavy dash set up. Later encoders get a hot glue coating to keep them from shorting with water ingress (there is a picture on the encoder thread the other day) AND the hot glue can be added to a dried out encoder IF it has got wet. I am not a fan of normal WD40, BUT they do a switch cleaner that I use for washing out/lubricating remote control micro switches. A@

Edited by Adrian@ on Thursday 13th June 16:12

[The Three D Mucketeer]

I assume a MK3 Targa is the same as my Convertible , in that the windows have to drop 1/2" when the doors open, so they miss the A post Bodywork ?
That's why knowing where the window is , is important , otherwise you smash the window opening the door .

[The Red Baron]

Fixed!! For now at least...

Thanks to all for your excellent suggestions and advice.

I disconnected the door ECU and left it disconnected while I disconnected the switch/door control panel (which was surprisingly easy to get to) and had a fiddle with that. I think the problem was the 'UP' switch had got stuck in the pressed position, which was upsetting everything. A little leverage with an appropriate tool and the switch released and when everything was reconnected it seems to work ok.

And while the centre bolster was out the way I adjusted the hand-brake warning light switch, which was staying on when the hand-brake was off.

And to top it off, I managed to fix the driver's side footwell heater vent, which had become dislodged.

A good day spent in the garage.

Isn't this what TVR ownership is all about?