|There are different types of lighting systems being used in
True cabinets, so there will be different types of
troubleshooting techniques that need to be used. The one common
aspect in all of the lighting circuits is that the bulbs being
used must be the same as the bulbs that were originally
installed in the cabinet. To test ballast determine which
lighting system you are working on and follow steps below:
Electromagnetic rapid start flourescent light circuit - There
are three different voltage tests. Incoming or ballast supply
voltage - Test at black and white wires going to ballast. You
should read approximately 118 volts. Filament voltage - Tested
between red to red wires or blue to blue wires. Depending on
which ballast you have you should get a reading between 2 and 5
volts with the bulbs out. Please call technical service with the
ballast number to get the correct voltage reading. High Voltage
- Test between either red wire and either blue wire. Again
depending on which ballast you are checking the vo