May 1, 2017

Troubleshooting a riding lawn mower blown fuse video

By Sears PartsDirect staff
Troubleshooting a riding lawn mower blown fuse video.
Troubleshooting a riding lawn mower blown fuse video.

Replacing a blown fuse on your riding lawn mower is easy, but finding the cause can be more difficult. Unless you locate and repair the short, you’ll just keep blowing fuses. This video shows you how to test your ignition switch and the engine, chassis, and dash wire harnesses to narrow down the suspects so you can repair the problem and get back to mowing.

For additional repair help, including common symptoms and troubleshooting tips, step-by-step riding lawn mower and tractor repair guides, and articles, check out our repair help section. In addition, find the riding mower parts you need to fix your mower.

Engine wire harness illustration

To find the part number of the engine wire harness, look it up using the engine model number, not the lawn tractor’s model number—engine parts are listed separately from the rest of lawn tractor parts.

Here's the diagram of the engine wire harness for the engine in this riding lawn mower, circled in red.

The chassis wire harness. If the fuse didn't blow with the engine wire harness connected, then the short is in the chassis wire harness. Find and repair the broken wire or replace the chassis wire harness.

Have you had your fill of checking wires yet? As we said at the start of this video, finding a short circuit can be challenging. Hopefully you have found and fixed the short in your mower's electrical system so it doesn’t keep blowing fuses.

Remember to use the wiring diagram for your type of riding lawn mower to find the short if your mower's wiring differs from this model.

I hope this video helped you out today. You can find links to any parts we talked about in the video description. Check out our other troubleshooting and repair videos on the Sears PartsDirect YouTube channel. Subscribe and we’ll let you know when we post new videos.

Symptoms common to all riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, dirty carburetor
Main causes: shift lever needs adjustment, neutral control needs adjustment
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged mandrel pulleys
Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, broken fuel line
Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a tune up
Main causes: faulty battery, bad alternator
Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tune up

Repair guides common to all riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower rear tire

Your mower can’t run on a damaged rear tire. Here’s how to install a new one.

Repair difficulty
Time required
 60 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower blade

If a blade on your mower is dull or bent, replace it following the steps in this repair guide.

Repair difficulty
Time required
 30 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower fuel filter

Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.

Repair difficulty
Time required
 15 minutes or less

Articles and videos common to all riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

August 6, 2020

How to remove a lawn mower blade using a removal tool

By Sears PartsDirect staff

Learn how a blade removal tool makes replacing the blade easier and safer

April 9, 2019

Riding mower parts and supplies to stock up on video

By Sears PartsDirect staff

Keep these 6 things on hand to keep the mower season running smoothly.

January 1, 1970

How to tell if a fuse is blown

By Lyle Weischwill

Learn how to tell whether a fuse is blown