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
Pinout Matrix
Normal Level
Signal Source
Ground to Tilt directional switches (SW19 and SW20). If not present, check the Armrest Board, wiring, and connections.
Battery voltage wrt BT1+
Armrest Board
Tilt Fingertip Module
Theory of Operation
Signal User
377
J407-G
GND
378
J408-A
NOT USED
379
J408-B
+V POT
Voltage to the Sideshift pot (P6). If not present, check the Armrest Board, wiring, and connections. Note: This switch is internal to the Fingertip Module. If switch is bad, replace the module.
Approx. 5V
Armrest Board
Sideshift Fingertip Module
380
J408-C
C POT
Output from the Sideshift pot (P6) wiper to the Armrest Board. If not present, check P6, wiring, and connections. Note: Check P6 by disconnecting it from the circuit and reading across it. Approx. 4K ohms should be read across J402-1 and 4.
Approx. 2.5V in neutral; range 0V to 5V
Sideshift Fingertip Module
Armrest Board
381
J408-D
GND POT
Ground to the Sideshift pot (P6). If not present, check the Armrest Board, wiring, and connections.
Battery voltage wrt BT1+
Armrest Board
Sideshift Fingertip Module
382
J408-E
MICRO
Input from Sideshift pot directional switch (SW21). If not present, check switch, wiring, and connections.
Approx. 5V closed; 0V open
Sideshift Fingertip Module
Armrest Board
383
J408-F
MICRO
Input from Sideshift pot directional switch (SW22). If not present, check switch, wiring, and connections.
Approx. 5V closed; 0V open
Sideshift Fingertip Module
Armrest Board
384
J408-G
GND
Ground to Sideshift directional switches (SW21 and SW22). If not present, check the Armrest Board, wiring, and connections.
Battery voltage wrt BT1+
Armrest Board
Sideshift Fingertip Module
385
J409-A
NOT USED
386
J409-B
+V POT
Voltage to the 4th Aux pot (P7). If not present, check the Armrest Board, wiring, and connections. Note: This switch is internal to the Fingertip Module. If switch is bad, replace the module.
Approx. 5V
Armrest Board
4th Aux Fingertip Module
387
J409-C
C POT
Output from the 4th Aux pot (P7) wiper to the Armrest Board. If not present, check P7, wiring, and connections. Note: Check P7 by disconnecting it from the circuit and reading across it. Approx. 4K ohms should be read across J403-1 and 4.
Approx. 2.5V in neutral; range 0V to 5V
4th Aux Fingertip Module
Armrest Board
Publication 1160093, Issued: 20 May 2013
8-45
