Service Brake Switches
Thetwo(2)switchesusedfortheservicebrakesarenor-
mally open switches that are located under the footrest
panel (Fig. 90). The service brake switches provide in-
puts for the TEC--5002 controller. When a brake pedal
isnotdepressed,thebrakepedalassemblycontactsthe
switch plunger to close the switch. When a brake is ap-
plied, the brake pedal assembly moves away from the
switch plunger, allowing the switch plunger to extend
and the switch to open.
2
1
1
Testing
1.
Before disconnecting a service brake switch for test-
ing, the switch and its circuit wiring should be tested as
a TEC controller input with the Info Center Diagnostic
Display (see Info Center Display in this section).
Figure 91
2.
ke switch and circuit wiring are functioning correctly, no
If the Diagnostic Display verifies thatthe service bra-
1.
Service brake switch
2.
Footrest panel
further switch testing is necessary.
1
3.
If the Diagnostic Display determines that the service
brake switch and circuit wiring are not functioning cor-
rectly, test seat switch.
2
4.
ignition switch. Locate service brake switch for testing.
Make sure ignition switch is OFF. Remove key from
13 to 17 in--lb
(1.5 to 1.9 N--m)
5.
Disconnect switch electrical connector from the ma-
chine wire harness.
4
6.
multimeter (ohms setting) across the connector termi-
nals.
Check the continuity of the switch by connecting a
3
Figure 92
7.
switch plunger depressed), there should be continuity
When the service brake is not applied (service brake
1.
2.
Screw (2 per switch)
Footrest panel
3.
4.
Switch (2 used)
Lock nut (2 per switch)
(zero resistance) between the switch terminals.
8.
switch plunger extended), there should be no continu-
ity (infinite resistance) between the switch terminals.
When the service brake is applied (service brake
9.
Replace switch if necessary.
10.Reconnect
switch electrical connector to the ma-
chine wire harness after testing.
Adjustment
Adjust the service brake switch so that the switch plung-
er always makes full contact with the brake pedal. Tight-
en fasteners from 13 to 17 in--lb (1.5 to 1.9 N--m).
Groundsmaster 5900/5910
Page 5 -- 51
Electrical System
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