Home / Guides / Problems & Quick Fixes

Troubleshooting

Common Plow Problems and Quick Fixes

Q: Why won't my snow plow lift?

Start with the electrical connections. Disconnect the plugs, check for corrosion on the pins, clean them, and reseat firmly. Also confirm the battery is healthy, since plow hydraulics draw significant current in deep cold.

Q: Why is my plow moving slowly?

Usually hydraulic fluid. Check the level, and note that very cold fluid thickens until it circulates. A weak battery or charging system also makes the pump feel slow. Check for leaks at hoses and cylinders.

Q: Why won't my plow hook up to the truck?

Almost always alignment or ice. Approach straight, get the height close before engaging, and clear packed snow or ice from the receivers.

Q: Is it normal for a plow blade to drift down?

A slow drift over a long period is common and not necessarily a fault. A blade that drops noticeably within a minute or two suggests internal leakage and needs service.

Q: When should I stop and get service?

Stop for a hydraulic leak beyond a light weep, anything bent or cracked, a blade that won't hold position, or no response after cleaning connections.

What to check when it won't lift, won't angle, or won't hook up. Written for 5 a.m. in the driveway.

Quick Answer

Most plow failures come down to three things: electrical connections, low or cold hydraulic fluid, and something mechanical binding. If your plow won't respond at all, start at the connectors, pull them apart and check for corrosion or a loose fit. If it moves slowly or weakly, look at fluid level. If it won't hook up, it's usually alignment or ice in the receivers. Work in that order and you'll solve most of what happens mid-storm.

On this page

Check these first
Plow does nothing
Slow or weak
Won't hook up
Blade drifts down
Lights out
When to stop
FAQ

Plows fail at inconvenient times because that's when you use them. The good news is that a large share of what goes wrong in the field is something you can check in a few minutes with a flashlight and no tools. This is what to look at, in the order worth looking.

Check these first

Before anything else: is the truck running, is the battery healthy, and are the plow connectors fully seated? Plow hydraulics draw real current, and a battery that starts your truck fine can still be too weak to run the pump in deep cold. Then pull the plow connectors apart and look at them. If the pins are green, dirty, or the connection feels loose, that's very often your entire problem.

The plow does nothing at all

No response from any function

Most likelyAn electrical connection. Disconnect the plow-side and truck-side plugs, inspect for corrosion, clean the pins, reseat firmly, and try again. Check the ground connection too.

Also checkBattery condition and voltage. Any inline fuses or breakers in the plow circuit. That the controller is powered and seated in its harness.

PreventionPack the connectors with dielectric grease before the season and again mid-winter.

Slow, weak, or hesitant movement

It moves, but not like it should

Most likelyHydraulic fluid: low level, or fluid that's too cold and thick. Check the level first. If the plow was stored outside in deep cold, give it a few cycles to warm and circulate before judging it.

Also checkBattery and charging system, since weak current makes a pump sluggish. Look for external leaks at hoses, fittings, and cylinders.

PreventionUse the correct hydraulic fluid for cold weather and check the level pre-season.

The plow won't hook up

It won't attach or won't release

Most likelyAlignment or ice. Drive the truck straight at the plow rather than at an angle, and get the height close before trying to engage. Ice and packed snow in the receivers is extremely common. Clear it out.

Also checkThat the plow is sitting level on the ground and hasn't settled into a rut or onto uneven ice, which changes the geometry more than you'd think.

PreventionPark the plow on flat, clear ground when you drop it, not in a spot where meltwater pools and refreezes.

The blade drifts down on its own

It won't hold position

Most likelyInternal hydraulic leakage past a valve or cylinder seal. This one usually isn't a field fix.

What to doA slow drift over a long period is common on many plows and not necessarily a fault. A blade that drops noticeably within a minute or two needs to be looked at. Bring it in.

Plow lights not working

One or both plow lamps out

Most likelyThe light harness connection, same corrosion story as the main plow plugs. Check the connectors at the plow and at the truck.

Also checkBulbs, and the aim if they work but you can't see well. Plow lights get knocked around and drift out of adjustment.

From the shop

If we could hand every customer one thing before winter it would be a small wire brush and a tube of dielectric grease. The number of calls that end with "I cleaned the plugs and it works now" is genuinely high. It's not sophisticated, it just works. Do it before the season and again around January.

"Check the connectors first. It's the least interesting answer and the most common one."

When to stop and call us

Don't push through these

Stop and bring it in if you see a hydraulic leak that's more than a light weep, if anything structural looks bent or cracked, if the blade won't hold position at all, or if you've cleaned the electrical connections and it still won't respond. Continuing to run a plow with a real hydraulic or structural problem turns a repair into a replacement, and it isn't safe.

We service WESTERN® plows at all six of our Central Wisconsin locations whether or not you bought it from us. In season we'll tell you honestly what the wait looks like.

Quick questions

My plow won't lift. What first?Pull the electrical connectors apart, clean the pins, reseat firmly.

Why is my plow slow?Usually hydraulic fluid level or cold thick fluid. Check the level.

Why won't it hook up?Alignment, or ice packed in the receivers. Clear it and square up.

Blade drops on its own?Slow drift can be normal. Fast drop means internal leakage. Bring it in.

Plow lights dead?Check the light harness connectors first, then bulbs.

Can a weak battery cause this?Yes. Hydraulics draw hard, especially in deep cold.

How do I prevent electrical issues?Dielectric grease in the connectors, pre-season and midwinter.

Do you service plows you didn't sell?Yes, at all six locations. Call 715-387-1200.

FAQ

Why won't my snow plow lift?

Start with the electrical connections. Disconnect the plow-side and truck-side plugs, check for corrosion or green on the pins, clean them, and reseat firmly. Also confirm the battery is healthy, since plow hydraulics draw significant current and a weak battery in deep cold can leave you with no response.

Why is my plow moving slowly?

Usually hydraulic fluid. Check the level first, and consider that very cold fluid thickens and moves sluggishly until it circulates. A weak battery or charging system will also make the pump feel slow. Look for leaks at hoses, fittings, and cylinders.

Why won't my plow hook up to the truck?

Almost always alignment or ice. Approach straight rather than at an angle, get the height close before engaging, and clear any packed snow or ice out of the receivers. A plow that settled into a rut or onto uneven ice will also sit at the wrong geometry to connect.

Is it normal for a plow blade to drift down?

A slow drift over a long period is common on many plows and isn't necessarily a fault. A blade that drops noticeably within a minute or two suggests internal leakage past a valve or cylinder seal, which needs service rather than a field fix.

How do I prevent most plow problems?

Clean the electrical connectors and pack them with dielectric grease before the season and again midwinter, keep hydraulic fluid at the right level with cold-weather fluid, and park the plow on flat clear ground so ice doesn't build in the receivers.

When should I stop and get service?

Stop if you see a hydraulic leak beyond a light weep, anything bent or cracked, a blade that won't hold position at all, or no response after cleaning the electrical connections. Running a plow with a real hydraulic or structural problem turns a repair into a replacement.

Written by the Wisconsin Western Plows sales & install team. We service WESTERN® snow plows at six Wheelers Family Auto Group locations across Central Wisconsin, whether or not you bought it from us. Call 715-387-1200.