Brilliant 7000 pilot and blower fan starts. When circulating fan goes to start it trips breaker every time. What's wrong

Possible short in wires to motor. If you have a amp. Probe you can check amps to motor on start up, the info tag on the furnace should tell how many amps it should pull,, if to many motor is bad and needs to be replaced

The short in the wires going to the motor doesn`t happen very often