Section 8.Theory of Operation

Model 4700 Maintenance Manual

Pinout Matrix Single Traction Motor Trucks >S/N 10676

42JCM-8 +V Voltage from the HCB to the Left (EV5) and Right (EV6) Sideshift Solenoids. If not present, check the HCB, wiring, and connections. Note: This voltage is common to both solenoids. If this voltage is lost, neither solenoid will work.

43JCM-9 thru 11NOT USED

44JCM-124th FUNCTIONVoltage from the HCB to turn on the 4th Function Solenoid (EV7). If not present, check the HCB, wiring, and connections.

45JCM-13+V Voltage from the HCB to the 4th Function (EV7 and EV8) Solenoids. If not present, check the HCB, wiring, and connections. Note: This voltage is common to both solenoids. If this voltage is lost, neither solenoid will work.

46JCM-144th FUNCTIONVoltage from the HCB to turn on the 4th Function Solenoid (EV8). If not present, check the HCB, wiring, and connections.

47JCM-15R SIDESHIFTVoltage from the HCB to turn on the Right Sideshift Solenoid (EV6). If not present, check the HCB, wiring, and connections.

48JCM-16 thru 18NOT USED

49JCM-19DRAIN Voltage from the HCB to turn on the Drain Solenoid (EVP). If not present, check the HCB, wiring, and connections.

Approx. 18V wrt

B+ (approx. 22ohms across coil)

HCBEV5, EV6

50JCM-20+V Voltage from the HCB to the Drain Solenoid (EVP). If not present, check the HCB, wiring, and connections.

51JCM-21 and 22NOT USED

52JCM-23GND B– supply to optional HCB. 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.

Approx. 18V wrt B+ (approx. 22ohms across coil)

Approx. 18V wrt B+ (approx. 22ohms across coil)

Approx. 2-13V wrt B+ when requesting lift and/or any aux function. (approx. 18 ohms across coil)

HCBEV7

HCBEV7, EV8

HCBEV8

HCBEV6

HCBEVP

Battery voltage wrt BT1+ B– at J1–HCB

53JCP-1 CAN L Communication between the PPA and the TPA (JCT-2). N/A TPA, PPATPA, PPA

54JCP-2 NOT USED

Publication 1160093, Issued: 20 May 2013