Trainman:
A thought on:
"I'm completely flummoxed! I installed the new relays, even can see their points opening and closing as it's supposed to, but the power to the track is staying on. Somehow, something is back feeding voltage into these circuits."
With some Z-Stuff switch motors connected to 1008 relays when the relay clicked the motor would not switch. It turns out the red LED's lights on the switch motors (part of the circuit) were 'leaky' and let too much voltage go through. So even though the relay worked the LED prevented the motor from switching. Maybe something like this is wrong wrong with your LED's?
Joe
