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
Theory of Operation
Pinout Matrix
Normal Level
Signal Source
Signal User
257
J40-15
CAN H
Communication line between the VM and optional HCB (J140-13). If option is not present, a jumper with terminating resistor is installed between J48-8 and J48-15.
N/A
VM
HCB
258
J40-16
AUX OUT 1
+24V output from VM, through fuse F10, to the optional Travel Alarm (BZ1 at J70+). If not present, check VM, wiring, and connections. Note: Option must be enabled in FlashWare.
+24V
VM
BZ1
259
J40-17
GND
B– supply to VM. This B– is shared by many components prior to and after the VM. If not present, follow back towards B– until loss can be determined.
Battery voltage wrt BT1+
B– at J1–
VM
260
J40-18
AUX IN 4
Input to the VM from the optional Reverse Working lights switch (SW29 at J94). If not present, check switch, wiring, and connections.
Approx. 5V open; 0V closed
SW29
VM
261
J40-19
AUX OUT 2
+24V output from the VM, through fuse F11, to Warning light (LP5 at J97).
+24V
VM
LP5
262
J40-20
+24V AUX
+24V input to VM from DC/DC converter (J96-4). If not present, check converter, wiring, and connections.
+24V
DC/DC Converter
VM
263
J40-21
+24V AUX
+24V input to VM from DC/DC converter (J96-4). If not present, check converter, wiring, and connections.
+24V
DC/DC Converter
VM
264
J40-22
AUX OUT 3
+24V output from the VM, through fuse F12, to Forward Left Work light (LP7 at J104).
+24V
VM
LP7
265
J40-23
AUX OUT 4
+24V output, through fuse F13, to Reverse Working lights (LP8 at J106 and LP9 at J105).
+24V
VM
LP8, LP9
266
J41-1
VCC
Supply voltage to the Lift pot (P3) Approx. 5V from the VM (J40-7). If not present, check VM, wiring, and connections.
VM
P3
267
J41-2
C POT
Wiper input from the Lift pot (P3) to VM (J40-11). Voltage will vary depending on lift request. The pot may need to be re-learned. If not present, check pot, wiring, and connections.
P3
VM
Publication 1160093, Issued: 20 May 2013
Approx. 2.5V in neutral; approx. 5V w/full lift requested
8-35
