- 1). Replace fuses if the control power indicator does not come on and there is no power to the unit. There are two automotive-style fuses on the vehicle control harness. One fuse operates the snow plow park/turn lamps; the other is for the snow plow control power. The replacement fuses should have the same amperage rating. A fuse with a higher rating could damage the system.
- 2). Remove any excess snow and/or ice from the blade if the snow plow won't raise or only raises slowly or partially. Check for sufficient hydraulic fluid in the reservoir. Fill the reservoir, if necessary. Always use a Fisher recommended hydraulic fluid.
- 3). Make sure the snow plow's battery unit has sufficient charge and is free from corrosion or dirt if the plow's angles, or wings, move slowly or partially. Check the charging system and replace the battery, if necessary.
- 4). Inspect all the hydraulic fittings and hoses for damage and to ensure that they are secure if the snow plow lowers by itself or will not stay in the raised position. Tighten or replace fittings and hoses as necessary.
- 5). Check that the vehicle's lighting harnesses are securely connected if the snow plow headlights operate irregularly or not at all. Inspect for burned out bulbs or corroded light sockets. Replace the bulbs and sockets, if necessary.
- 6). Make sure the snow plow control harness is securely connected if the motor does not run.
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