Service Manual

Multi Pro 5800Page 6 − 62Electrical System
Master Boom (Spray Enable) Switch
The master boom switch is a momentary push button
switch. The switch is an input to the TEC. The master
boom switch controls the operation (on/off) of all the
boom spray valves simultaneously. The master boom
switch is located on the side of the control console (Fig.
86).
Testing
The master boom (spray enable switch) and its circuit
wiring can be tested as a TEC input or qualifier using the
InfoCenter Display (see InfoCenter Display − Diagnos-
tics Screen in this chapter). If testing determines that the
switch and circuit wiring are not functioning correctly,
proceed with the following test procedure:
1. Park machine on a level surface, stop engine and en-
gage parking brake. Remove key from ignition switch.
2. Remove console cover(s) to gain access to switch to
be tested (see Console Assembly in Chapter 9 − Chas-
sis in this manual).
3. Locate the switch and disconnect the wire harness
electrical connector from the switch.
4. With the use of a multimeter (ohms setting), the mas-
ter boom switch functions may be tested to determine
whether continuity exists across the terminals for each
switch position. Continuity (zero ohms resistance)
should exist across the switch terminals when the switch
is depressed. There should not be continuity (infinite
ohms resistance) across the switch terminals when the
switch is not depressed.
1. Control console 2. Master boom
(spray enable) switch
Figure 86
1
2
5. Replace master boom switch if testing determines
that it is faulty.
6. If the master boom switch tests correctly and a circuit
problem still exists, check wire harness (see Electrical
Schematic and Wire Harness Drawings in Appendix A
in this manual).
7. Connect the wire harness connector to the switch af-
ter testing.
8. Install console covers (see Console Assembly in
Chapter 9 − Chassis of this manual).