Bobcat S185 & Melroe grader

[goldy]

G'day all, new to this site. The Bobcat is an 2008 'K' series SJC. The grader is an older unit (serial 802700188). Got an issue with flow to the grader for three functions. At the moment I can get flow for only two functions . With the system set to rear stabilizer function to give me the third function normally used for stabilizers set to give me the third function, I operate any button assigned to the grader, I loose flow to the grader. It indicates to me that when a button is operated it closes a solenoid for the constant flow required for the grader valve bank. Computer setting? The grader is connected by the way of a attachment control kit/computer control wiring loom. Hoping that someone has half an idea here as it has the local Tech stumped. Thanks if anyone can help. Goldy.