I would like to check the supply pressure upstream of the MFWA clutch pack solenoid. The tractor won't disconnect the FWA with 12 vdc power to solenoid coil. I tested the pressure down stream of the clutch at the test port on the bottom of the FWA case. I have 160# with FWA switch off and zero pressure with clutch switch on which would be correct since the clutch is spring applied. What hydraulic port would i hook to to see pressure up stream of the solenoid valve. I thought about unhooking the steel line and teeing in there. I suspect that the fwa clutch pack has a blown seal.