BML03519 Is anyone familiar with the operation and type of switch used to control aux hydraulics on the 187-3617 Loader Control Handle? The wiring diagram and theory of operation in manual calls it a PWM switch. Is it in fact a signal generator or just a variable resistor that the 168-8238 Aux. Hydraulic Controller reads which then creates PWM signal for 185-4254 aux solenoids? The wiring diagram does not break down 187-3617 handle assembly. It shows one wire N997-MP13 for Thumb Rocker PWM which goes directly to 168-8238 controller as Aux Hyd Lever Pos (PWM). I connected scope to solenoid and saw no waveform, just steady 4 volts. I connected scope across wires Ground 203-MP2 and Aux Hyd Lever Pos (PWM) N997-MP-13 at Aux Controller and saw steady 7.5v with no change while rocking switch. New Handle ass. is $800+. Im trying to be thorough in my diagnostic procedure. Thanks, Dan Romano 3475028669
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