Triumph Stag Australia
Fairly common in cold and damp.. remove both switches from the console. Mark wires and remove.. spray into them at the edges with wd 40. Cleand all the terminals and pit wires on. Test them before reinstalling.. tjey should work..
It will be the little thermal overload switch. This has a bi-metal strip that opens the circuit when the windows are either fully open or close This as a consequence shuts power off. Then these quite quickly re-set for next operation. This little jigger has very small spade clips, I had one slip off once for no obvious reason. I searched all obvious things until I found the culprit.
You will find it behind the glovebox area.
Good luck.
Warwick is after some advice on his elec windows