Model 4700 Maintenance Manual

Section 8.Theory of Operation

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

281J46-1 +24V +24V to optional 5th Function switch (PB5) from fuse F7. If not present, check fuse, wiring, and connections.

282J46-2 5TH SOLENOID (optional)

283J47-1 GND

When switch (PB5) is closed, voltage is allowed to pass to optional 5th Solenoid Valve (EV11). If not present, check switch, wiring, and connections.

One of the grounds supplied by the VM (J40-6) to Lowering switch (SW15). If not present, check VM, wiring, and connections.

+24V DC/DC Converter PB5

+24V PB5EV11

Battery voltage wrt BT1+ VMSW15

284J47-2 NOT USED

285J47-3 AUX IN 1Input to VM (J40-13) from the Lowering switch (SW15). If not present, check switch, wiring, and connections.

286J47-4 NOT USED

287J70+ AUX OUT 1Output from VM (J40-16), through fuse F10, to the optional Travel Alarm (BZ1). If not present, check VM, fuse, wiring, and connections. Note: Option must be enabled in FlashWare.

288J70– GND B– supply to optional Travel Alarm (BZ1). 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.

289J71-1 GND B– supply to Power Amplifier Fan. This B– is shared by many components prior to and after the fan. If not present, follow back towards B– until loss can be determined.

290J71-2 +24V

+24V to the Power Amplifier Fan from fuse F5. If not present, check fuse, wiring, and connections.

291J71-3 FAN DRIVEOutput from the VM (J40-2) to the Power Amp Fan (FN1). If not present, check VM, wiring, and connections. Should be present within a minute of turning Key switch ON.

292J71-4 NOT USED

Approx. 5V open; 0V closed SW15VM

+24V VMBZ1

Battery voltage wrt BT1+ B– at J1–BZ1

Battery voltage wrt BT1+ B– at J1–Power Amp Fan

+24V DC/DC Converter Power Amp Fan

Approx. 5V On; 0V Off VMPower Amp Fan

Publication 1160093, Issued: 20 May 2013 8-37

Section 8.Theory of Operation

Model 4700 Maintenance Manual

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

293J91-1 GND B– to the Left Brake Light (LP3) and Left Tail Light (LP4). If not present, follow back towards B– until loss can be determined.

294J91-2 TAIL LIGHTOutput from the VM (J34-1) to the Left Tail Light (LP4). If not present, check VM, wiring, and connections.

295J91-3 TAIL LIGHTOutput from VM (J34-1) to the Tail Lights (LP2 and LP4). If not present check VM, wiring, and connections.

296J91-4 BRAKE LIGHTOutput from the VM (J34-13) to the Left Brake Light (LP3) when traveling and changing direction or traveling and pressing brake pedal. If not present, check VM, wiring, and connections.

297J91-5 BRAKE LIGHTOutput from VM (J34-13) 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.

298J91-6 NOT USED

+24V ON; 0V OFF VMRight Brake Lights

J96 6-Pin Config. on Dual Traction Motor Trucks <S/N 29999 and Single Traction Motor Trucks <S/N 10677

299J96-1B–B– to DC/DC converter. If not present, make sure battery is connected. Check wiring and connections. A jumper is installed to J96-6.

300J96-2 B+ B+ to DC/DC converter when CT1 coil is energized. If not present, check F2, SW1, CT1 coil, CT1 tips, wiring, and connections.

301J96-3 NOT USED

302J96-4 +24V +24V from DC/DC converter to 24V circuit. If not present, check for power and ground to converter.

303J96-5 NOT USED

304J96-6 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

Converter +24V Circuits

Converter

Publication 1160093, Issued: 20 May 2013