1973 FJ40 was running great, then let me down roadside. Originally I was seeing only 10v at +coil side with ignition in run, but the truck ran. I figured I had a detiorating ignition switch. Then during the break down I had 0v with key on run. Figured my ignition switch was failed completely. I ran a jumper from + on battery to + on coil and was able to start it up and get me home. I replaced the switch with a new OEM switch and I'm still getting 0v at coil with key in run. I jumped out the fusible link to see if that changed anything but no dice. What could it be other than a faulty wire inside the harness? Thanks!