Technician A says open circuit testing of the BCM power supplies indicate if there is high resistancs in the circuit. technician B says that open circuit testing has the potential to lead to improper diagnostics. who is right?

Technician A says open circuit testing of the BCM power supplies indicate if there is high resistancs in the circuit. technician B says that open circuit testing has the potential to lead to improper diagnostics. who is right?

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