Model 4700 Maintenance Manual

Single Traction Motor Trucks >S/N 10676

Single Traction Motor Trucks >S/N 10676

1JAM NOT USED

2JAP-1 thru 3NOT USED

3JAP-4 +V OUTOutput to optional Mast Height switch (SW31). If not present, check wiring and connections.

4JAP-5 NOT USED

5JAP-6 IN Input to VM from optional Mast Height switch (SW31). If not present, check switch, wiring, and connections.

6 JAP-7 thru 14NOT USED

7JAT-1 thru 3NOT USED

8JAT-4+V OUT+V Out to the configuration jumper(s) designating Model C60, EE, or both.

Section 8.Theory of Operation

Pinout Matrix

Switch closed: B+ open: 0V

9JAT-5 CONF.Input to VM (configuration jumper) for Model C60, standard and EE. Open/+V Key if jumpered

10JAT-6 CONF.Input to VM (configuration jumper) for all EE models. Open/+V Key if jumpered

11JAT-7 thru 14NOT USED

12JBP-1 +V KEYB+ from Key switch (SW1). If not present, check Key switch, wiring, and connections.

13JBP-2 +V COILVoltage from the PPA to CT2 coil (J50-5). If not present, check the PPA, wiring, and connections. Approx. 32ohms across coil.

14JBP-3 NOT USED

15JBP-4 SEAT Input from the Seat switch (SW2). If not present, check seat switch, jumper, wiring, and connections.

16JBP-5 SAFETY/ AMPLIFIER ENABLE

17JBP-6 NOT USED

B– from JBP-11 on the PPA. If voltage is >1V (wrt B–), check the jumper from JBP-11. If jumper is OK, check B– to the PPA.

18JBP-7 +V OUTVoltage to SW30 and SW2. If not present, check PPA, wiring, and connections.

Publication 1160093, Issued: 20 May 2013

Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout Matrix Single Traction Motor Trucks >S/N 10676

19JBP-8 –V COILVoltage from the PPA to CT2 coil (J50-6). If not present, check PPA, wiring, and connections. Approx. 32ohms across coil.

Approx. B+ to energize coil; drops to approx. 14V for holding wrt B+

PPACT2

20JBP-9 OUT B– from PPA to TPA (JBT-5). Battery voltage wrt BT1+ PPATPA

21JBP-10 NOT USED

22JBP-11 B– Ties the SAFETY/AMPLIFIER

ENABLE input to JBP-5 low. If not low, check the PPA.

Battery voltage wrt BT1+ PPAPPA

23JBP-12 NOT USED

24JBT-1 +V KEYB+ from Key switch (SW1). If not present, check Key switch, wiring, and connections. This is used by the TPA to determine BSOC.

25JBT-2 +V COILVoltage from the TPA to CT3 coil. If not present, check the TPA, wiring, and connections. Approx. 32ohms across coil.

26JBT-3 +V AUX COILVoltage from the TPA to Relay 1 (RL1 at J51-1) coil. If 36V battery, RL1 stays de-energized. If 48V battery, RL1 is energized to allow 12V drop across R3, providing 36V to CT1. If not present, check TPA, wiring, and connections. Approx. 1K ohm across coil.

27JBT-4 SEAT Input from the Seat switch (SW2). If not present, check seat switch, associated wiring, and connections.

0V with 36V battery; 24V with 48V battery wrt JBT-9

TPARL1

28JBT-5 SAFETY B– from PPA (JBP-9) to TPA.Battery voltage wrt BT1+ PPATPA

29JBT-6 NOT USED

30JBT-7 +V OutVoltage from the TPA to the optional Speed Reduction switch. If not present, check TPA, wiring, and connections. Jumpered if no switch.

31JBT-8 –V COILVoltage from the TPA to CT3 coil. If not present, check TPA, wiring, and connections. Approx. 32ohms across coil.

Approx. B+ to energize coil; drops to approx. 14V for holding wrt B+

Publication 1160093, Issued: 20 May 2013