Control System 39Service Manual – SW8000SpecificationsSample Shop Voltage MeasurementsExamining signals sent and received at the control board can be very effectivein determining if external components are functioning as expected or if thecontrol board is processing them as expected. The tables below show samplevoltage measurements taken from a typical machine. Actual voltages will varyfrom machine to machine, and with battery charge level.To aid in taking voltage measurements from the cable connectors withoutremoving the connector, a T-shaped push pin connected to the voltmeter probewire works well (see image to the right).Main Machine Controller Sample Voltage Measurements at the J1 ConnectorPin # Name V-On V-Off Ref. CommentsJ1-1 Hopper closevalve 0.25 13.7 B-J1-2 Main broomvalve 0.3 13.7 B-J1-3 Side broom valve 0.3 13.7 B-J1-4 Dust controlvalve 0.266 B- Using litter control vacJ1-5 Hopper up/downvalve 0.27 13.7 B- On = raising, Off = rest or downJ1-6 Hopper up/bypass vlv 0.3 13.7 B-J1-7 Hopper openvalve 0.25 13.7 B- On = closed, Off = openJ1-8 Dust ctrl bypassvlv 0.3 13.7 B- On = bypassJ1-9 Hopper lowervalve 0.25 13.7 B- On = down, Off = up or restJ1-10 Bat- 0.011 B- Key OnJ1-11 Switched Bat+ 13.9 B- Engine runJ1-12 NC B-J1-13 NC B-J1-14 Shaker relay 0.07 13.9 B-J1-15 Back up alarm 0.01 B- Not equippedJ1-16 Light relay 0.04 13.9 B-J1-17 Throttle out 13.0 2.6 B- On = high, Off = idleJ1-18 Neutral pos. relay 0.05 13.9 B- On = not neutral, Off = neutralJ1-19 Horn relay 0.04 12.0 B-J1-20 Bat- 0.01 B- Key onT-PinProbe Wire
