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
J96 5-Pin Config. on Dual Traction Motor Trucks S/N 29999 and up 305
J96-1
B+
B+ to DC/DC converter when CT1 coil is energized. If not present, check F2, SW1, CT1 coil, CT1 tips, wiring, and connections.
B+
CT1
DC/DC Converter
306
J96-2
B–
B– to DC/DC converter. If not present, make sure battery is connected. Check wiring and connections. A jumper is installed to J96-6.
Battery voltage wrt BT1+
B–
DC/DC Converter
307
J96-3
NOT USED
308
J96-4
+24V
+24V from DC/DC converter to 24V circuit. If not present, check for power and ground to converter.
+24V
DC/DC Converter
+24V Circuits
309
J96-5
B–
B– to DC/DC converter. If not present, make sure battery is connected. Check wiring and connections. A jumper is installed to J96-1.
Battery voltage wrt BT1+
B–
DC/DC Converter
310
J97
AG+, N–
Connection for optional Warning Light (LP5).
+24V ON; 0V OFF
VM
LP5
311
J100-1
B+
B+ to auxiliary power strip from J50-11. If not present, check fuse F4, wiring, and connections.
B+
BT1
Aux Power
312
J100-2
NOT USED
313
J100-3
B–
B– to auxiliary power strip. If not present, make sure battery is connected. Check wiring and connections.
Battery voltage wrt BT1+
B–
Aux Power
314
J101
L, CH input
Connection for optional Lift-Limit Push Button Switch (PB9).
24V ON; 0V OFF
VM
EV12
315
J102-1
GND
B– supply from Battery. This B– is used by LP1 and LP2. If not present, follow back towards B– until loss can be determined.
Battery voltage wrt BT1+
BT1
LP1 and LP2
316
J102-2
TAIL LIGHT
Output from VM (J34-1) to the Right Tail Light (LP2). If not present, check VM, wiring, and connections.
+24V
VM
Tail Lights
317
J102-3
TAIL LIGHT
Tied to J102-2.
+24V
VM
Tail Lights
318
J102-4
TAIL LIGHT
Output from VM (J34-1) to the Right Brake Light (LP1) when traveling and changing direction or traveling and pressing brake pedal. If not present, check VM, wiring, and connections.
+24V
VM
Brake Light
Publication 1160093, Issued: 20 May 2013
8-39
