Multi Pro 1750
Page 5 − 33
Electrical System
The machine electrical schematic and wire harness
drawings in Chapter 10 − Electrical Drawings can be
used to identify possible circuit problems between the
controller and the input/output devices (e.g. switches
and solenoid coils).
Because of the solid state circuitry built into the TEC,
there is no method to test the controller directly. The con-
troller may be damaged if an attempt is made to test it
with an electrical test device (e.g. digital multimeter or
test light).
NOTE: The TEC and the InfoCenter used on the Multi
Pro 1750 are matched for correct machine operation. If
either of these components are replaced for any reason,
system software needs to be reprogrammed by your
Toro Distributor.
IMPORTANT: Before performing welding on the ma-
chine, disconnect both positive and negative bat-
tery cables from the battery, disconnect the wire
harness connector from the TEC and disconnect
the terminal connector from the engine alternator.
These steps will prevent damage to the machine
electrical system when welding.
Figure 32
1
11
21
31
41
30
20
10
40
50
NOTE TAB POSITION
WIRE HARNESS CONNECTOR FOR TEC
Electrical
System
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