Model 4700 Maintenance Manual

Section 8.Theory of Operation

All Dual Traction Motor Trucks and Single Traction Motor Trucks <S/N10677Pinout Matrix

377J407-G GND

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

378J408-A NOT USED

379J408-B +V POTVoltage 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.

380J408-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.

381J408-D GND POTGround to the Sideshift pot (P6). If not present, check the Armrest Board, wiring, and connections.

382J408-E MICROInput from Sideshift pot directional switch (SW21). If not present, check switch, wiring, and connections.

383J408-F MICROInput from Sideshift pot directional switch (SW22). If not present, check switch, wiring, and connections.

384J408-G GND Ground to Sideshift directional switches (SW21 and SW22). If not present, check the Armrest Board, wiring, and connections.

385J409-A NOT USED

386J409-B +V POTVoltage 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.

387J409-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. A pprox. 4K ohms should be read across J403-1 and 4.

Approx. 5VArmrest Board Sideshift Fingertip Module

Approx. 2.5V in neutral; range 0V to 5V

Sideshift Fingertip Module

Armrest Board

Battery voltage wrt BT1+ Armrest Board Sideshift Fingertip Module

Approx. 5V closed; 0V open Sideshift Fingertip Module

Approx. 5V closed; 0V open Sideshift Fingertip Module

Armrest Board

Armrest Board

Battery voltage wrt BT1+ Armrest Board Sideshift Fingertip Module

Approx. 5VArmrest Board 4th Aux Fingertip Module

Armrest Board

4th Aux Fingertip Module Item Connection Function Description Theory of Operation Normal Level Signal Source Signal User

Publication 1160093, Issued: 20 May 2013 8-45

Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout MatrixAll Dual Traction Motor Trucks and Single Traction Motor Trucks <S/N10677

388J409-D GND POTGround to the 4th Aux pot (P7). If not present, check the Armrest Board, wiring, and connections.

389J409-E MICROInput from 4th Aux pot (P7) directional switch (SW23). If not present, check switch, wiring, and connections.

390J409-F MICROInput from 4th Aux pot (P7) directional switch (SW24). If not present, check switch, wiring, and connections.

391J409-G GND Ground to 4th Aux pot (P7) directional switches (SW23 and SW24). If not present, check the Armrest Board, wiring, and connections.

392J411-1 GND Ground to the Horn switch (PB12) on the Armrest Board. If not present, check the switch, armrest board, wiring, and connections.

393J411-2 HORN Input from the Horn switch (PB12) to the Armrest Board when pushed. If not present, check the switch, wiring, and connections.

394J412-1 GND

395J412-2NOT USED

396J412-3LIFT LIMIT BYPASS

Optional voltage from Armrest Board to PB13.

Optional input to Armrest Board from PB13.

397PPA B+B+B+ from the battery to the PPA through fuse FP. If not present, make sure the battery is connected. Check fuse, wiring, and connections.

398PPA B–B–B– from the battery to the PPA. If not present, make sure the battery is connected. Check wiring and connections.

399PPA (U)PPA (U)One of three phases from the PPA to the Pump Motor. Voltage is measured between any two phases. If not present, check the PPA, wiring, and connections.

400PPA (V)PPA (V)One of three phases from the PPA to the Pump Motor. Voltage is measured between any two phases. If not present, check the PPA, wiring, and connections.

Battery voltage wrt BT1+ Armrest Board 4th Aux Fingertip Module

Approx. 5V closed; 0V open 4th Aux Fingertip Module

Approx. 5V closed; 0V open 4th Aux Fingertip Module

Armrest Board

Armrest Board

Battery voltage wrt BT1+ Armrest Board 4th Aux Fingertip Module

Approx. 5VArmrest Board PB12

Approx. 0V closed; 5V open

PB12Armrest Board

B– Armrest Board Armrest Board

Approx. 0V closed; 5V open

Armrest Board Armrest Board

Battery voltage wrt BT1+ BT1PPA

0 to approx. 20VAC; Approx. 200A ramping; Approx. 250A full lift

PPAPM

PPAPM

Publication 1160093, Issued: 20 May 2013