Here is the service manual: http://bryantrv.com/docs2/docs/subsw.pdf
Electric element information is on page 15.
1440 Watts - 12 amps AC
10 ohms (if resistance is less than that then it is shorted and will draw to much current)
Wiring diagram is shown at the bottom of page 10
All connections have to be clean (no corrosion).
At 12 amps, the circuit should only have a 15 amp breaker in order to prevent the sort of problem you are seeing (excess current resulting in overheated wires).