High voltage service disconnect assembly and method for determining an isolation resistance fault of a battery pack

A method for determining an isolation resistance fault of a battery pack utilizing a high voltage service disconnect assembly, the battery pack having an enclosure, a first battery module, a second battery module, a positive pack voltage terminal, a negative pack voltage terminal;

• the high voltage service disconnect assembly having a housing, a detection circuit, and a first light emitting device;
• the housing configured to secure first and second conductive pins thereon, the first conductive pin configured to be removably electrically coupled to a negative voltage terminal of the first battery module, the second conductive pin configured to be removably electrically coupled to a positive voltage terminal of the second battery module;
• the method comprising:
• outputting a first isolation resistance fault signal from the detection circuit when a first isolation resistance fault is detected between the negative pack voltage terminal and the enclosure, the detection circuit being electrically coupled to the first and second conductive pins;
• and
• emitting light from the first light emitting device electrically coupled to the detection circuit in response to the first isolation resistance fault signal.