Diodes - Cub Cadet 2000 Series Professional Shop Manual

2000 Series Tractors

Diodes

• What is a diode? A diode acts like a one way
valve, allowing current to flow in only one direc-
tion. See Figure 7.61.
• Which way does this electrical check-valve
work? There will be a band on one end of the
diode. The band indicates the negative side of
the diode
• Most DMMs have the ability to test a diode.
Testing a diode:
1. Isolate the diode in the circuit.
Set the DMM to the diode or Ω scale.
2.
See Figure 7.62.
3. Attach the negative lead of the DMM to the side of
the diode with a band on it.
4. Place the positive lead on the other side of the
diode.
140
Silver band
(-)
electrons flow from the negative to the positive.
Figure 7.61
Diode scale
Figure 7.62
(+)