Service Manual

Control Ignition Delay Module (Groundsmaster 345)
The control ignition delay module on the Groundsmas-
ter 345 is one of the components in the interlock system.
Whenever the run enable relay is energized, the control
ignition delay module is energized and allows current to
the engine ignition control module. If the run enable
relay is de–energized (e.g. operator gets of
f the seat),
the control ignition delay module will de–energize after
.5 second and will cause the engine to stop running as
power to the engine ignition control module is shut off.
The module is attached to a bracket under the instru-
ment panel next to the battery.
Testing
1. Locate control ignition delay module. Unplug wire
harness connectors from module.
2. Connect multimeter (DC volts setting) leads to mod-
ule terminals P1–2 (meter + lead) and P1–1 (meter –
lead) (Fig. 9).
3. Connect a jumper lead from module terminal P1–4
to module wire connector J1.
4. Using a 12 VDC power source, apply +12 VDC to ter-
minal P1–3 and ground terminal P1–1.
5. Connect a second jumper lead to module terminal
P1–3 and touch terminal P1–4. The multimeter display
should show 12 VDC as long as the jumper is connected
to P1–4.
6. Disconnect the jumper wire from module wire con-
nector J1 while watching the multimeter display. The
meter should show 0 VDC after .5 seconds.
P1–3
P1–2
P1–4
P1–1
J1
Figure 9
Glow Relay (Groundsmaster 328–D)
The Groundsmaster 328–D (diesel engine) uses a relay
to energize the engine glow plugs. This glow relay is at-
tached to the frame below the radiator assembly.
86
87
Testing
1. Verify coil resistance between terminals 86 and 85
85 30
with a multimeter (ohms setting) (Fig. 10). Resistance
should be from 41 to 51 ohms.
87
85 86
2. Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87. Ground terminal 86 and apply +12
Figure 10
VDC
to terminal 85. The relay should make and break
continuity between terminals 30 and 87 as +12 VDC is
applied and removed from terminal 85.
3. Disconnect voltage and leads from the terminals.
Electrical System (Rev. G)
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Groundsmaster 300 Series
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