Glow Controller
The glow controller is located under the console cover.
2
NOTE: Refer to Chapter 9 -- Electrical Schematics and
Diagrams when troubleshooting the controller.
3
2
1
6
5
4
Controller Operation
1.
Whentheignition switch isplaced intheONposition,
the controller energizes the glow plugs and lights up the
glow lamp for 7 to 10 seconds.
2.
tion, the glow plugs will energize and the glow lamp will
When the ignition switch is held in the START posi-
1
not light.
3.
ON, the glow plugs will deenergize and the glow lamp
will remain off.
When the ignition switch is released from START to
3
Figure 30
Controller Checks
1.
2.
Glow controller end view
Controller top view
3. Controller side view
1.
2.
Make sure there is power from the battery.
5.
to terminal 1 exists and any of the other conditions in
step 4 are not met:
If any of the conditions in step 3 are not met or power
Disconnect electrical connector to the run solenoid
to prevent the engine from starting.
A. Verify continuity ofthe circuitry from the battery to
the glow relay and glow plugs (see Chapter 9 -- Elec-
trical Schematics and Diagrams).
3.
PlaceignitionswitchintheONposition.Verifythefol-
lowing while in the ON position:
A. Glow indicator lamp is on.
B. Glow relay is energized.
C. Glow plugs are energized.
B. Verify continuity ofthe circuitry from the battery to
ignition switch, glow controller, glow lamp, glow
relay, and ground (see Chapter 9 -- Electrical Sche-
matics and Diagrams).
D. Glow indicator lamp goes out and glow plugs
deenergize after 10 seconds.
C. Replace parts as necessary.
6.
Connect electrical connector to the run solenoid.
4.
the following while in the START position:
Place ignition switch in the START position. Verify
A. Glow indicator lamp is out.
B. Glow relay is energized.
C. Glow plugs are energized.
D. Power to terminal 1 of the glow controller.
NOTE: Ifthereisnopowertoterminal1oftheglowcon-
troller, verify continuity of the circuitry from the ignition
switch to the controller and perform step 4 again (see
Chapter 9 -- Electrical Schematics and Diagrams).
Electrical System (Rev. A)
Page 5 -- 20
Groundsmaster 4500--D/4700--D
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