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Connector/cable short circuit:
Wires and connectors circuit breaker failure may be due to broken wire, bad contact of the connector, and connector Terminal loose making. Due to a break in the middle of the wire failure is very rare, and mostly on the connectors disconnected, therefore, should focus on careful examination to check the sensor and connect along wires, with the loose and poor. Circuit breaker fault caused by poor contact between connector and is often due to the connector end to rust, dirt from outside terminals or connected socket, resulting in a reduced contact pressure. At this point, as long as the connector is removed, reinstall plug in again to change its connection status, to resume normal contact.