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20） GLOW LAMP TIMER
Description and Location
The glow plug indicator light timer is an
electronic timer that is located under the
engine cover on the right side of the tractor
firewall. The timer controls how long the
glow plug indicator light on the instrument
panel remains illuminated when the key
switch is in the “HEAT” position
(approximately 4 ～ 5 seconds). The glow
plug indicator light timer does not control
current to the glow plugs, only current to the
indicator light on the instrument panel. The
timer turns the indicator light off by opening
the circuit to the light on the instrument
panel.
Glow Plug Indicator Light Timer
Operation Testing
1. Disconnect the negative (-) battery cable
from the battery.
2. Remove the bolt retaining the light timer
to the tractor and disconnect the timer
from the main wiring harness.
NOTE:
The terminals are not number or letter coded
on the light timer.
3. Connect a jumper wire from terminal
"C" on the timer, 1, to the positive (+)
terminal of a 12-volt power supply.
4. Connect a test light, 2, from terminal
"A" of the timer, 1, to the positive (+)
terminal of a 12-volt power supply.
5. Connect a jumper wire from terminal
"D" of the timer, 1, to the negative (-)
terminal of the 12-volt power supply.
Observe the test light, 2.
6. The test light should illuminate for
approximately 4～ 5 seconds and then
turn off. If the test light fails to
illuminate or does not turn off after 4～
5 seconds, the timer is defective and
needs replaced.
7. Connect the negative (－ ) battery cable
to the battery.
565Y
566Y
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