Air Conditioning Switch (Groundsmaster 4010--D)
The air conditioning switch is used to control operation
of the air conditioning system on the Groundsmaster
4010--D.
35).
The switch is located in the cab headliner (Fig.
Testing
1.
Make sure ignition switch is OFF. Remove key from
ignition switch.
2.
3.
Remove switch plate from cab headliner.
2
Locate air conditioning switch and unplug wire har-
ness connector from switch.
1
4.
36.
The switch terminals are marked as shown in Figure
The circuit logic of the air conditioning switch is
Figure 35
shown in the chart below. With the use of a multimeter
(ohmssetting),theswitchfunctionsmaybetestedtode-
termine whether continuity exists between the various
terminals for each position. Verify continuity between
switch terminals. Replace switch if testing identifies a
faulty switch.
1.
Cab headliner
2.
Air conditioning switch
4
1
5
6
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
AC OFF
2 + 3
2 + 1
5 + 4
5
+ 6
2
3
AC ON
2 + 1
5 + 4
2 + 3
5 + 6
BACK OF SWITCH
Figure 36
5.
If switch tests correctly and circuit problem still ex-
ists, check wire harness (see Electrical Schematics and
Wire Harness Drawings in Chapter 10 -- Foldout Draw-
ings).
6.
Connect the wire harness connector to the air condi-
tioning switch after testing.
7.
Install switch plate to cab headliner after switch test-
ing is complete.
Groundsmaster 4000--D/4010--D
Page 5 -- 31
Electrical System
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