Furnace: Lennox Pulse
Thermostat: Honeywell RTH6500WF
I have the similar setup as the person in the below link
When I connect the unused blue wire to T Terminal on furnace to C Terminal, then R to R with jumper to Rc on stat, Y to Y, G to G, W to W. Flip the breaker. Thermostat is not powered? The thermostat works because I had a backup plan to use a AC adapter and it worked fine.
What troubleshooting can I do with this issue. I have multimeter.