How to Troubleshoot a Problem With a Fisher Plow

No Power and/or Pump Motor Doesn't Run

• 1

  Make sure the power is turned on at the plow remote control in the interior of the vehicle.

• 2

  Unplug and reconnect both the plow control wiring harness and the lighting wiring harness.

• 3

  Check the fuse in the vehicle control wiring harness, and replace if it is defective.

Snow Plow Doesn't Lift or Lifts Partially

• 4

  Check for excess weight on the plow. Remove accumulated snow and ice. Remove any aftermarket accessories, such as lights, that add significantly more weight to the plow.

• 5

  Check the hydraulic fluid level in the pump reservoir. Add hydraulic fluid, if necessary.

• 6

  Verify that the 12-volt battery in the vehicle is fully charged. Make sure the vehicle charging system is operating properly.

Plow Doesn't Angle Properly

• 7

  Check the hydraulic fluid level in the pump reservoir. Add hydraulic fluid, if necessary.

• 8

  Perform the manufacturer's recommended annual hydraulic bleeding procedure, to remove air from the hydraulic pistons.

• 9

  Verify that the 12-volt battery in the vehicle is fully charged. Make sure the vehicle charging system is operating properly.

Plow Won't Lower or Lowers By Itself

• 10

  Make sure the manufacturer's recommended hydraulic fluid is installed and that it is the correct grade for the present outside temperature.

• 11

  Check the fuse in the vehicle control wiring harness, and replace if it is defective.

• 12

  Tighten hydraulic fittings and hose connections. Look for any damaged components and consult the manufacturer for service.

Leaking Hydraulic Fluid

• 13

  Determine whether the fluid reservoir is overfilled.

• 14

  Tighten hydraulic fittings and hose connections. Look for any damaged components and consult the manufacturer for service.

• 15

  Evaluate the condition of O-rings and seals in the hydraulic system. If replacement is required, consult the manufacturer for service.

Excessive Drain On Vehicle Electrical System

• 16

  Make sure the manufacturer's recommended hydraulic fluid is installed and that it is the correct grade for the present outside temperature.

• 17

  Verify that the 12-volt battery in the vehicle is fully charged. Make sure the vehicle charging system is operating properly.

• 18

  Check the vehicle manufacturer's specifications for the vehicle electrical system, to determine if the system is adequate to accommodate the plow.

Lights Not Operating or Lights Operating Erratically

• 19

  Disconnect and reconnect the plow/vehicle lighting wiring harness to verify the connection.

• 20

  Check for burned out bulbs, bulbs loose in sockets or corroded sockets.

• 21

  Check for a defective fuse in the control harness, if the plow's parking/turn lamps are inoperative.

• 22

  Check for a burned out headlamp or a defective fuse in the vehicle, if the vehicle headlamps are inoperative.