Groundsmaster 3500 Page 6 − 15 Electrical System
Glow Controller (Diesel Engines Only)
The controller is located under the instrument panel.
NOTE: Refer to Foldout Drawings − Chapter 9 in this
manual when troubleshooting the glow controller.
Controller Operation
1. When the ignition switch is placed in the RUN posi-
tion, the controller energizes the glow plug relay and illu-
minates the glow lamp for 10 seconds.
2. When the ignition switch is held in the START posi-
tion, the glow plug relay will energize while the switch is
held in START and the glow lamp will not illuminate.
3. When the ignition switch is released from START to
RUN, the glow plug relay will de−energize and the glow
lamp will remain off.
Controller Checks
1. Make sure there is power from the battery.
2. Disconnect electrical connector to the fuel stop sole-
noid to prevent the engine from starting.
3. Place ignition switch in the RUN position. Verify the
following while in the RUN position:
A. Glow indicator lamp is on.
B. Glow relay is energized.
C. Glow plugs are energized.
D. Glow indicator lamp goes out and glow plugs de−
energize after 10 seconds.
4. Place ignition switch in the START position. Verify
the following while in the START position:
A. Glow indicator lamp is out.
B. Glow relay is energized.
C. Glow plugs are energized.
D. Power exists at terminal 1 of the glow controller.
NOTE: If there is no power to terminal 1 of the glow con-
troller, verify continuity of the circuitry from the ignition
switch to the controller and perform Step 4 again (see
Foldout Drawings − Chapter 9 in this manual).
5. If any of the conditions in Step 3 are not met or power
to terminal 1 exists and any of the other conditions in
Step 4 are not met:
A. Verify continuity of the circuitry from the battery to
the glow relay and glow plugs (see Foldout Drawings
− Chapter 9 of this manual).
B. Verify continuity of the circuitry from the battery to
ignition switch, glow controller, glow lamp, glow
relay, and ground (see Foldout Drawings − Chapter 9
in this manual).
C. Replace parts as necessary.
6. Connect electrical connector to the fuel stop solen-
oid when finished.
1. Glow controller end view
2. Top view
3. Side view
Figure 13
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6
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Electrical
System
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