Recreational Vehicle (RV) Technician Practice Test

In what direction should a diode have continuity?

1. Both directions

2. Neither direction

3. One direction

4. In reverse direction

The correct answer is: One direction

A diode is designed to allow current to flow in one direction while blocking it in the opposite direction. This property is known as rectification. When testing a diode with a multimeter set to the continuity setting or diode test mode, you would expect to find continuity in only one direction, which indicates that the diode is functioning correctly. In the forward bias (the direction the diode is designed to conduct), the multimeter will show continuity, meaning current can pass through. In the reverse bias (the opposite direction), the diode should not show continuity, indicating it is blocking current flow as intended. Understanding this characteristic is crucial for RV technicians, as many systems in recreational vehicles rely on diodes for controlling electrical flow, protecting circuits from backflow, and ensuring proper function of components like lights and appliances. The ability to identify if a diode is functioning correctly can prevent electrical issues in RV systems.