Hi.
If the hood trips the circuit breaker then there is a short. Checking the wires visually is not enough to say that there is no short. Testing is done using a multimeter tool set on impedance (it will read Ohms).
If there is a short between two wires, then the multimeter will read zero impedance (impedance
If the unit trips with fan selector knob in off position, then the short is either at the power cord, at the knob contacts, or because of wiring with heat melting insulation . If possible reach the power cord and test it. The power cord can be tested reading impedance at its plug's prongs. If the prongs read low impedance , then the cord is shorted (zero ohms between two AC plug prongs means that there is contact between wires of different phase). If there is zero Ohms, then there is a short. If the power cord is OK, read starting from the switch side between switch 120VAC and one ground point. If there is low impedance, then the short is back going toward the power socket. Do that until you find the short.
If the unit trips with fan selector on test the knob. Read if there is zero Ohms between knob contacts (usually between its contacts but check also switch contacts). In that case the motor is shorted because of a contact and must be replaced. Other test is done disconnecting and insulating knob contacts and starting the unit. Check also the dual burner switch.
If the unit trips with burner OFF, then the problem is before the switch. Usually power cord or power cord contacts.
Here all parts and diagrams for this unit.Regards.
Ginko