Fisher minute mount goes up and left and locks up

Start by plugging everything in and pop the cover off the control part on the plow and check for magnetism on all 3 solenoids when you hit the various buttons on your plow controller. The pull should be very strong and noticable...a weak magnetic pull is likely just residual magnetism on your screwdriver. In my case, the S3 solenoid wasn't firing and that causes exactly what you're describing.

If your S3 isn't firing you can test the wiring by moving the S3 hot wire to the S2 solenoid. If your wiring is good the plow will misbehave in an entirely different way. Also get out your ohm meter and test the S3, if its good you should get 7 ohms on it.

You need to use the guide from Fisher and be methodical about it. Start at the plow and work your way backwrds towards the truck.

2002 Fisher Minute Mount Inst-Act Wont Angle [Archive] - PlowSite ...

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Nov 17, 2011 - 90 posts - ‎9 authors
My plow went up it was jerking and did it in steps , but , it got there . Now , it onlyjerks when i try to angle it right or left or up . I filled the fluid ... Drop it and if it doesn'traise you can just use a jack and shorten the transport chain to hold it. .... I do havecontinuity on the plow side for all 3 wires going to the plug . Hooking Up A Fisher Minute Mount 2 In Under 1 ...
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Ultramount Intermittent Angle Problem - Snow Plow Forum - L

You may have to release some tension in the packing nut on the piston seal, if its too tight it will bind and slow down the piston, try replacing the fluid also with synthetic Mobil 1 Transmission fluid !

If you have a Minit Mount two it's probably the valve sticking. It's electronically controlled so if it clicks, then the solenoid is working and the shuttle in the valve is stuck. Can be disassembled and cleaned. New ones are best but pricey.

check the wiring connections on the plow solenoids to be sure they are correct, the second step is check the controller box, using a continuity check via multimeter set for DC voltage. I have an old western plow that had similar symptoms, and was the controller box.

Not familiar with model, but valves click at the same time motor is suppose to run. Check power and ground to motor (or try running it with jumper cables, but don't be where plow can angle and squish you. If good power but won't spin, clean brushes/commutator/check bearings in motor.

does the pressure release close to raise the plow?

there is a relay to it

Contact the plow manufacturer for the diagram by application