Diode Assemblies
The diode D1 and D2 provide logic for the interlock
switches. Diode D3 is used for circuit protection from in-
ductive voltage spikes when the interlock relay is deen-
ergized. Machines equipped with the standard control
module (serial numbers above 240000000) use only
one diode.
2
3
Two types of diodes have been used on the Reelmaster
3100−D:
1
4
1.
On early production machines, the diodes are lo-
cated within the main wiring harness that lies under the
hydraulic tank and control console (Fig. 13).
Figure 13
3.
4.
1.
2.
Diode
Male terminal blade
Female terminal blade
Clear PVC tubing
2.
Later production machines use diodes that plug into
the wiring harness (Fig. 14). Location of the diodes is un-
der the control console.
2
Testing
The diodes can be individually tested using a digital
multimeter (ohms setting) and the tables below.
1.
Diodes located within the main harness (Fig. 13):
3
1
Multimeter
Red Lead (+)
on
Multimeter
Black Lead (−)
on
Figure 14
3.
Continuity
1.
2.
Diode
Male terminal
Female terminal
Terminal Blade Terminal Blade
Male
Female
Male
YES
NO
Female
2.
Plug−in style diodes (Fig. 14):
Multimeter
Red Lead (+)
on Terminal
Multimeter
Black Lead (−)
on Terminal
Continuity
Female
Male
Male
YES
NO
Female
Electrical Systems (Rev. C)
Page 5 − 34
Reelmaster 3100−D
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