First off, Hello. New to the site. I have a 2001 753 G series. I bouhgt it with the aux. hyd fittings on the boom capped. I don't believe they were ever used. My problem is when I try to use a grapple the aux. hyd will not change direction. I can get the hyd. to come on and off with trigger( the lines flex, indicating closing pressure or flow), but toggle will not change the flow ie. cannot open grapple. Fuses are good. Switches and wiring seem fine, like new. Stuck solenoid on control valve? Need advise where to go next. Thanks, Matt