System for testing railroad crossing signals

A railroad crossing signal test system, comprising:

• a power source;
• a timer device;
• a voltage regulator electrically coupled to the power source;
• a first relay and a second relay;
• a plurality of test leads, comprising:
• a first test lead and a second test lead configured to operate a bell of a railroad crossing signal;
• a third test lead configured to operate a left light of the railroad crossing signal;
• a fourth test lead configured to operate a right light of the railroad crossing signal;
• and
• a fifth test lead configured to energize a common connection between the left light and the right light of the railroad crossing signal;
• and
• a plurality of switches, comprising:
• a first switch configured to operate the bell of the railroad crossing signal, the first switch electrically coupled to the first test lead and an output of the voltage regulator and is configured to supply power from the voltage regulator to the first test lead;
• a second switch configured to enable flashing of the left light of the railroad crossing signal, the second switch electrically coupled to a coil of the second relay and a normally-closed terminal of the first relay;
• a third switch configured to enable flashing of the right light of the railroad crossing signal, the third switch electrically coupled to the fourth test lead and a normally-open terminal of the first relay;
• and
• a fourth switch configured to enable the railroad crossing signal test system, the fourth switch electrically coupled to the power source and the voltage regulator;
• wherein:
• the timer device is electrically coupled to a coil of the first relay and is configured to provide periodic electrical pulses;
• the second test lead is electrically coupled to the output of the voltage regulator;
• the third test lead is electrically coupled to a normally-closed terminal of the second relay;
• and
• the fifth test lead is electrically coupled to a common terminal of the second relay.