I’ve replaced switch,old one would work about
every 100 clicks,new one does absolutely nothing motors work fine when switch works.
It’s getting cold,how should I trouble shoot
to pinpoint issue ?
Inspect your switch installation job very closely and make certain the switch IS good.
If all is good there, then there must be a wiring fault between the switch and the window motors.
This means tracing the wiring using a continuity tester at different points.