Figure 3-3. Contactor unit, exploded view (Sheet 2 of 2)
d. Diode Bridge Block
Note. Forward resistance is measured
The diode bridge block
with negative lead to cathode and
can be tested with an ohmmeter after the leads are
positive lead to anode.
disconnected. (fig. 3-4.)
(1) Measure the forward resistance of each
diode. The resistance should be approximately 10 to 20
(2) Measure the backward resistance of each
diode. The resistance should be greater than 200 ohms.