The Internal Lighting System contains three circuits and features a three-way double switch circuit in addition to a relay. The student will operate the circuit in the normal operation mode using the description of the normal circuit operation. After gaining a complete understating of the operation of the normal three-way switch circuit, the students will in-put each of the ten faults and troubleshoot the circuit using a voltmeter. Circuit faults contain opens and shorts as well as special test points used to take voltage reading.
