Well, I figured it out and now feel kind of stupid. When I redid the wiring, the wires going into the taillight sockets were corroded, so I took the contacts out of the plastic socket and resoldered them. I must have reversed them when I put them back in. I actually had brake lights when the lights were on (but no taillight) When I applied the brake, it was lighting the taillight filament. Because the brighter brake filament was already on, there was no difference. Oh well, live and learn. Thanks to those that tried to help me!