[tucsonjwt]

Carefully remove each door switch. You have to hold on to the center pin with small vice grips or pliers and turn the nut out. If you don't use this method you will just twist the switch around in the hole. Gently pull the switch out of the door pillar and see if the wires are OK (not frayed, still intact in the switch). You can put an alligator clip on the switch and to the hole in the door pillar and operate the plunger. If you get intermittent operation, replace the switch - available cheap at any parts store. My driver's door switch will not come on periodically, then work properly on occasion - fiddle with the door switch and it works properly.