Original poster: "mf31 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mf31-at-qwest-dot-net> hey ya, is this correct? "Yep. Checked that out. That's what's going on alright. The first terminal is "common", the second terminal is the wiper and the third is tapped before the end of the winding." must be why i tripped the breaker, with a lightbulb test, got really bright for a second. dan.