Service Manual

Groundsmaster 4100--D/4110--DPage 5 -- 26Electrical System
Hi/Low Speed and Headlight (Groundsmaster 4110--D) Switches
The Hi/Low speed and headlight switches (Ground-
smaster 4110--D) are identical, two (2) position rocker
switches that are located on the control console.
TheHi/Low speedswitch (Fig. 28)is used asan input for
the TEC--5002 controller to set the machine traction
speed for Hi s peed (2WD) or Low speed (4WD).
TheGroundsmaster4110--Dheadlightswitchallowsthe
headlights to be turned on and off.
NOTE: Before disconnecting the Hi/Low speed switch
for testing, the switch and its circuit wiring should be
tested as a TEC--5002 input with the Diagnostic Display
(see Diagnostic Display in the Troubleshooting section
ofthis chapter). Ifthe Diagnostic Displayverifies that the
Hi/Low speed switch and circuit wiring are functioning
correctly, no further switch testing is necessary. If, how-
ever, the Display determines that the Hi/Low speed
switch and circuit wiring are not functioning correctly,
proceed with test.
Testing
1. Make sure ignition switch is OFF. Remove key from
ignition switch.
2. Disassemble console arm to gain access to switch
thatistobetested (seeConsole ArmDisassembly inthe
Service and Repairs section of Chapter 7 -- Chassis).
3. Disconnect harness electrical connector from the
switch.
4. With the use of a multimeter (ohms setting), the
switch functions may be tested to determine whether
continuity exists between the various terminals for each
switch position. The switch terminals are marked as
shown in Figure 29. The circuitry of the switch is shown
in the chart below. Verify continuity between switch ter-
minals. Replace switch if testing identifies a faulty
switch.
SWITCH
POSITION
CIRCUIT 1 CIRCUIT 2
ON 2+3 5+6
OFF 2+1 5+4
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. After testing is completed, connect wire harness
connector to the switch.
7. Assemble console arm (see Console Arm Assembly
in the Service and Repairs section of Chapter 7 -- Chas-
sis).
1. Console arm 2. Hi/Low speed switch
Figure 28
1
2
Figure 29
BACK OF SWITCH
NOTE: Switch terminals 1, 4, 5 and 6 are not used on
Groundsmaster 4100--D and 4110--D machines.