Fusible Link Harness; Diode Assembly - Toro Groundsmaster 300 Series Service Manual

Fusible Link Harness

The Groundsmaster 328–D and Groundsmaster 345
use three (3) fusible links for circuit protection. These
fusible links are located in a harness that connects the
starter B+ terminal to the main wire harness. If any of
these links should fail, current to the protected circuit will
cease. Refer to wire harness drawings in Chapter 6 –
Electrical System for additional fusible link information.
Use a multimeter to make sure that continuity exists be-
tween each terminal pin in connector P1 and connector
J1 at the starter (Fig. 7). If any of the fusible links are
open, replace the complete harness.

Diode Assembly

Two (2) diode assemblies (Fig. 8) are used in the ma-
chine wire harness. Diode D1 is used for circuit protec-
tion from inductive voltage spikes that occur when the
starter motor is shut off. Diode D2 provides logic for the
interlock switches to allow the engine to run when the
traction pedal is in neutral and the PTO switch is off. The
diodes plug directly into the wiring harness.
Testing
The diodes can be individually tested using a digital
multimeter (diode test or ohms setting) and the table be-
low.
Multimeter Multimeter
Red Lead (+) Black Lead (–)
on Terminal on Terminal
Female
Male Female
Groundsmaster 300 Series
Continuity
Male YES
NO
1
1. Diode
2. Male terminal
Page 6A – 7
FUSIBLE LINK
FUSIBLE LINK
FUSIBLE LINK
Figure 7
2
3
Figure 8
3. Female terminal
Electrical System (Rev. G)