Model 4700 Maintenance Manual
Section 8. Theory of Operation
All Dual Traction Motor Trucks and Single Traction Motor Trucks <S/N 10677 Item
Connection
Function Description
233
J37-1
GND
234
J37-2
NOT USED
235
J37-3
236
Theory of Operation
Normal Level
Pinout Matrix Signal Source
Signal User
Ground to Speed Reduction switch (PB2) from the VM (J34-6). If not present, check VM, wiring, and connections.
Battery voltage wrt BT1+
VM
PB2
SP. RED. (TURTLE)
Provides input to VM (J34-29) from the Speed Reduction switch (PB2). If not present, check switch, wiring, and connections.
Approx. 0V when PB2 closed; approx. 5V open
PB2
VM
J39-1
GND
Ground to Forward Hand Direction switch (SW9) from the VM (J34-6). If not present, check VM, wiring, and connections.
Battery voltage wrt BT1+
VM
SW9
237
J39-2
GND
Ground to Reverse Hand Direction switch (SW10) from the VM (J34-6). If not present, check VM, wiring, and connections.
Battery voltage wrt BT1+
VM
SW10
238
J39-3 and 4
NOT USED
239
J39-5
FW
Provides input to VM (J34-30) from Forward Hand Direction switch (SW9). If not present, check switch, wiring, and connections.
Approx. 5V switch open; 0V switch closed
SW9
VM
240
J39-6
NOT USED
241
J39-7
BW
Provides input to VM (J34-19) from Reverse Hand Direction switch (SW10). If not present, check switch, wiring, and connections.
Approx. 5V switch open; 0V switch closed
SW10
VM
242
J39-8
NOT USED
243
J40-1
LIFTING
Input to VM from Lifting switch (SW11 at J42-3). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW11
VM
244
J40-2
FAN DRIVE
Output from the VM to the Power Amp Fan (FN1 at J71-3). If not present, check VM, wiring, and connections. Should be present within a minute of turning Key switch ON.
Approx. 5V ON; 0V OFF
VM
FN1
245
J40-3
SIDESHIFT
Input to VM from Sideshift switch (SW13 at J44-3). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW13
VM
246
J40-4
4TH
Input to VM from 4th Function switch (SW14 at J45-3). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW14
VM
Publication 1160093, Issued: 20 May 2013
8-33
