Fault Diagnosis

Upon finding the motor circuit was not operating correctly it was decided to trace the fault; so that appropriate action could be taken.
1. Using a continuity tester all the PCB was tested to ensure that no solder had 'tracked' across between lines. Only one case was found and quickly rectified but did not resolve the fault.
2. Using a voltmeter all voltages were inspected. Starting at the main battery pack and traced successfully to the motor circuit board. All voltages entering the motor circuit board were correct but the expected voltages that should have been seen on the motor terminals were not there. This suggests that there is a fault with the motor chip; which willneed replacing.