Component Tests and General Diagnostics

1. Attach probe circuit tester (in volt range) to middle portion of each filament.







^ When measuring voltage, wrap tin foil around the top of the negative probe. Then press the foil against the wire with your finger.







2. If a filament is burned out, circuit tester registers 0 or 12 volts.







3. To locate burned out point, move probe along filament. Tester needle will swing abruptly when probe passes the point.