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High Temperature Switch
The high temperature switch is located on the top right
side of the water pump, which is located on the rear end
of the engine block. It has a connector which a gray wire
(Fig. 59).
CAUTION
Make sure engine is cool before removing the
temperature switch.
1. Lower the coolant level in the engine and remove
Figure 59
the high temperature switch.
2. Put the switch in a container of oil with a thermome-
ter and slowly heat the oil (Fig. 60).
CAUTION
Handle the hot oil with extreme care to prevent
personal injury or fire.
Figure 60
3. Check the continuity of the switch with a multimeter
(ohms setting). The switch is normally open and should
4. Allow the oil to cool. The switch should open below
close between 245 to 255_F (118 to 124_C).
245_F (118_C).
Electrical System
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Groundsmaster 3000/3000–D