Clutch start switch

1991 Nissan Ext cab P/U, 200k miles, 2.4L, Std Trans

Car running well except had to push clutch very hard to get to start. Now won't start at all. Can hear a click from a small white electrical box under dash near clutch. Pulled out the small switch from under the pedal(clutch start switch?), Checked continuity, seems OK. Tried to jumper around the switch but made no difference. What else could it be? How can I get around this switch and/or the next relay to get the car running? Or any other suggestions?

thanks
davey