There was a wonderful post several months back that showed how a lister had developed an electrical setup that provided a good boost to the current going from the switch located on the console to the power window motors. I believe this may have been specific to the rear windows in an XJ Series 2 co…

Power window switch booster for XJ12C, 1976

Aristides (Aristides Balanos) June 3, 2019, 5:55am 7

Is the windows lift wiring on the SII different from the SIII?
Because in my SIII I’ve put relays and now my windows DO go up and down !