Service Manual

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 c ab headliner.
3. Locate w indshield wiper/washer switch and unplug
wire harness connector from switch.
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 o f a multimeter (ohms
setting),theswitchfunctionsmaybe testedtodetermine
whether continuity exists between the various terminals
foreachposition.Verifycontinuitybetweenswitchtermi-
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. Connectthe 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
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