Testing A Diode - Cub Cadet 6X4 Shop Handbook

• 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 DVOMs have the ability to test a diode.
13.

Testing a diode:

13a. Isolate the diode in the circuit.
13b. Set the DVOM to the diode or Ω scale.
See Figure 9.77.
Diode scale
Figure 9.77
13c. Attach the negative lead of the DVOM to
the side of the diode with a band on it.
13d. Place the positive lead on the other side of
the diode.
13e. There should be continuity.
See Figure 9.78.
Figure 9.78
Continuity
Silver band
(-)
(+)
13f. Switch the leads.
13g. The meter should indicate no continuity.
See Figure 9.79.
13h. If the results do not match the above,
replace the diode.
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Chapter 9 - Electrical
No continuity
Silver band
(+)
(-)
Figure 9.79