I wanted to say hello as I am a new member, and wanted to share some info on a recent problem with my quick coupler. During trouble shooting I found no power at the coupler switch.Checked the fuses all good there. Started ringing wires and found a open circuit for power to the switch. Isolated the problem to a section of harness chaffed by a hyd line. Pictures below. Also found a ground issue at the cab to lower platform ground lug. When lowering the cab the ground to the switch would go away. cleaned the ground lug up.
more pics
Good stuff. Great for future reference. Thanks for posting!