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Groundsmaster 4000--D/4010--DPage 5 -- 30Electrical System
Windshield Wiper/Washer Switch (Groundsmaster 4010--D)
The windshield wiper/washer switch is used to control
operation of the windshield wiper and washer pump on
the Groundsmaster 4010--D. The windshield wiper/wa-
sher switch is located in the cab headliner (Fig. 33).
Testing
1. Make sure ignition switch is OFF. Remove key from
ignition switch.
2. Remove switch plate from cab headliner.
3. Locate windshield wiper/washer switch and unplug
wire harness connector from s witch.
4. The switch terminals are marked as shown in Figure
34. The circuit logic of the wiper/washer switch is shown
in the chart below. With the use of a multimeter (ohms
setting),theswitch functions may be tested to determine
whether continuity exists between the various terminals
foreachposition.Verify continuitybetweenswitchtermi-
nals. Replace wiper/washer switch if testing identifies a
faulty switch.
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
OFF NONE ALL
WIPER ON 2+3 5+6
WASHER ON 2+3
5+6
NONE
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 switch af-
ter testing.
7. Install switch plate to cab headliner after switch test-
ing is complete.
1. Cab headliner 2. Wiper/washer switch
Figure 33
1
2
Figure 34
12
4
3
56
BACK OF SWITCH