Help please

I need some help. I have a Coleman eb20b electric furnace. It’s very old and simple. Two breakers, 2 sequencers, 2 sets of coils, a transformer, fan relay, and capacitor. Recently had issues where the fan would start make a funny noise and shut off. Since the unit is so old I replaced the motor, sequencers, fan relay, and the capacitor. During replacement of the motor there were two wires from the motor going to the capacitor and one wire from the Capacitor going two the main compartment which I assume provide the voltage to the capacitor. But I lost where that wire goes to. If I plug the fan into the always closed terminal on the relay the fan will run all the time but the heat coils will not. If I plug the fan onto the normally closed side the heat coils fire up but no fan. I do read voltage across those pins so there is a signal to turn on. The wiring diagram shows a common wire also from the capacitor to the transformer. But I’m not sure if the voltage feeding into the capacitor should be 25v or 120v. Does anyone know? Any help is appreciated.