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Groundsmaster 4100--D/4110--DPage 5 -- 42Electrical System
Windshield Wiper/Washer Switch (Groundsmaster 4110--D)
The windshield wiper/washer switch is used to control
operation of the windshield wiper and washer pump on
the Groundsmaster 4110--D. The windshield wiper/wa-
sher switch is located in the cab headliner (Fig. 48).
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 switch.
4. The switch terminals are marked as shown in Figure
49. The circuit logic of the wiper/washer switch is shown
in the chart below. With the use of a multimeter (ohms
setting), the switch functions may betested todetermine
whether continuity exists between the various terminals
for each p osition. Verify continuity between switch termi-
nals. Replace wiper/washer switch if testing identifies a
faulty switch.
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
OFF 2+1 5+6
WIPER ON 2+3 5+6
WASHER and
WIPER ON
(MOMENTARY)
2+3
5+6
2+1
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 48
1
2
Figure 49
BACK OF SWITCH