1997 Ford F150 power windows and interior lights

When I open my door and the interior light come on I know I have power windows. When the interior lights click off before I shut the door, I know the power windows won't be working. Some how these are on the same circuit. I can be driving and I can hear a "click" and then the windows will work. The wipers also seem to be tied into this but not all the time. If I don't have wipers, I can turn off the engine and then just turn on the ignition but don't start the engine and the wipers will work. This is driving me nuts as I have replaced relays thinking one might be shorting or hanging up but it hasn't helped.