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Groundsmaster 5900/5910 Page 5 -- 39 Electrical System
Traction Assist Switch
The traction assist switch is used as an input for the
TEC--5001 controller to energize the solenoid valve in
the traction control manifold. When the traction assist
switch is depressed, hydraulic flow is split equally be-
tween front and rear wheels for enhanced traction. The
traction assist switch only functions when the machine
is in low speed range and in the forward direction. The
traction assist switch is located on the console arm (Fig.
69).
Testing
1. Before disconnecting the traction assist switch for
testing, the switch and its circuit wiring should be tested
as a TEC controller inputwith the Info Center Diagnostic
Display (see Info Center Display in this section).
2. If the Diagnostic D isplay verifies that the traction as-
sist switch and circuitwiring arefunctioning correctly,no
further switch testing is necessary.
3. If the Diagnostic Display determines that the traction
assist switch and circuit wiring are not functioning cor-
rectly, test traction assist switch.
4. Make sure ignition switch is OFF. Remove key from
ignition switch.
5. Disassemble console arm to gain access to traction
assist switch (see Console Arm Disassembly in theSer-
vice and Repairs section of Chapter 7 -- Chassis).
6. The switch terminals are marked as shown in Figure
70. The c ircuit logicof the tractionassist switch is shown
in the chart to the right. With the use of a multimeter
(ohms setting), the switch functions may betestedtode-
termine whether continuity exists between the various
terminals for each position. Verify continuity between
switch terminals. Replace switch if testing identifies a
faulty switch.
7. Connect the harness connector to the switch after
testing.
8. 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).
9. Assemble console arm cover (see Console Arm As-
sembly in the Service and Repairs section of Chapter 7
-- Chassis).
1. Console arm 2. Traction assist switch
Figure 69
1
2
Figure 70
12
4
3
56
BACK OF SWITCH
SWITCH
POSITION
CLOSED
CIRCUITS
OPEN
CIRCUITS
NORMAL 2+3
5+6
2+1
5+4
TRACTION
ASSIST
2+1
5+4
2+3
5+6
Electrical
System