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Diode Assemblies
Diodes D1, D2 and D3 provide logic for the latch relays
used in the ProCore 648. Diode D4 is used for circuit
protection from voltage spikes when the electric clutch
is de–energized. The diodes plug into the wiring har-
ness at various locations (see Wire Harness Drawings
in Chapter 8 – Electrical Diagrams).
Diode Test
3
2
The diodes (Fig. 37) can be individually tested using a
digital multimeter (diode test or ohms setting) and the
table to the right.
Figure 37
1
1. Diode 3. Female terminal
2. Male terminal
Multimeter
Multimeter
Red Lead (+)
Black Lead (–)
Continuity
on Terminal
on Terminal
Female Male YES
Male Female NO
ProCore 648
Page 5 – 27
Electrical System
Electrical
System