Common Trailer Problems and How to Fix Them
Owning a trailer comes with many benefits, whether you’re hauling equipment, vehicles, or recreational gear. However, trailers also require regular maintenance, and problems can arise if they’re not properly cared for. Ignoring small issues can lead to major breakdowns, costly repairs, and even safety hazards on the road.
To help you prevent breakdowns and stay safe, here are some of the most common trailer problems and how to fix them.
1. Trailer Tire Blowouts
Problem:
Trailer tires are constantly under stress from heavy loads, long distances, and rough road conditions. A blowout can occur due to low tire pressure, overloading, or dry rot.
How to Fix It:
✅ Check Tire Pressure – Always inflate tires to the manufacturer’s recommended PSI.
✅ Inspect Tires for Cracks and Bulges – Replace any tires with visible damage.
✅ Rotate and Balance Tires – This helps prevent uneven wear.
✅ Use the Right Load-Rated Tires – Ensure your tires can handle your trailer’s weight.
🔧 Tip: Replace trailer tires every 5-7 years, even if they look fine.
2. Trailer Lights Not Working
Problem:
If your brake lights, turn signals, or running lights aren’t working, you could face a serious safety risk and legal trouble.
How to Fix It:
✅ Check the Wiring Harness – Look for frayed, corroded, or loose wires.
✅ Inspect the Trailer Plug Connection – Dirt and rust can block the connection. Clean it with electrical contact cleaner.
✅ Replace Burned-Out Bulbs or Fuses – If only one light is out, the bulb or fuse may be the issue.
✅ Use Dielectric Grease – Apply it to electrical connections to prevent corrosion.
🔧 Tip: Regularly test your trailer lights before every trip.
3. Trailer Brakes Not Working Properly
Problem:
If your brakes feel weak, squeaky, or unresponsive, they may be worn out or improperly adjusted.
How to Fix It:
✅ Check the Brake Pads and Rotors – Replace worn-out brake pads.
✅ Adjust the Trailer Brake Controller – If you have electric brakes, recalibrate the brake controller in the tow vehicle.
✅ Inspect the Brake Wiring – Loose or corroded wires can disrupt the brake signal.
✅ Check Hydraulic Brake Fluid (for Surge Brakes) – Top off fluid if it’s low.
🔧 Tip: Service trailer brakes every 12,000 miles or annually.
4. Trailer Swaying or Fishtailing
Problem:
Trailer sway happens when the trailer moves side to side uncontrollably, making towing dangerous.
How to Fix It:
✅ Distribute Weight Evenly – Keep heavier cargo over the axles.
✅ Check Tongue Weight – It should be 10-15% of the total trailer weight.
✅ Use a Sway Control Hitch – This helps stabilize the trailer.
✅ Drive at Safe Speeds – Reduce speed if you experience sway.
🔧 Tip: Avoid loading heavy items in the rear, as it increases sway.
5. Trailer Hitch Issues
Problem:
If your trailer isn’t attaching or detaching properly, the hitch, ball, or coupler may be misaligned or rusted.
How to Fix It:
✅ Lubricate the Hitch Ball and Coupler – Prevents grinding and rust buildup.
✅ Inspect for Rust or Cracks – Replace any damaged hitch components.
✅ Ensure Proper Hitch Height – The trailer should be level when hitched.
✅ Use the Right-Sized Hitch Ball – Mismatched sizes cause loose connections.
🔧 Tip: Always double-check that the hitch is locked before towing.
6. Weak or Broken Suspension Components
Problem:
A bumpy, unstable ride can indicate worn-out suspension parts like leaf springs, torsion axles, or bushings.
How to Fix It:
✅ Inspect Leaf Springs for Cracks or Rust – Replace any damaged springs.
✅ Check Bushings and Shackles – Worn-out bushings cause excess movement.
✅ Lubricate Moving Parts – Grease the suspension components regularly.
✅ Check Axle Alignment – A misaligned axle can cause uneven tire wear.
🔧 Tip: If your trailer rides rough, suspension problems may be the cause.
7. Trailer Frame Rust and Corrosion
Problem:
Over time, moisture and road salt can cause the metal frame to rust, weakening the structure.
How to Fix It:
✅ Wash Your Trailer Regularly – Especially after driving in wet or salty conditions.
✅ Apply Rust-Proof Coating – Use rust-resistant paint or spray.
✅ Check for Structural Cracks – Small cracks can lead to major failures.
🔧 Tip: If storing outside, use a trailer cover to protect against the elements.
8. Trailer Jack Not Functioning Properly
Problem:
A stuck or broken trailer jack makes hitching and unhitching difficult.
How to Fix It:
✅ Lubricate the Jack Gears – Prevents grinding and stiffness.
✅ Inspect for Rust or Bends – Replace if necessary.
✅ Use a Jack Stand for Stability – If lifting a heavy trailer, use extra support.
🔧 Tip: Consider upgrading to an electric trailer jack for easier use.
9. Safety Chains Are Damaged or Too Loose
Problem:
If safety chains break or drag, they won’t be effective in an emergency.
How to Fix It:
✅ Check for Rust or Weak Links – Replace worn-out chains.
✅ Ensure Chains Are Crossed Under the Hitch – This prevents the tongue from hitting the ground if detached.
✅ Adjust Chain Length – Chains should allow turning but not drag on the ground.
🔧 Tip: Safety chains are your last line of defense, so inspect them before every trip.
Final Thoughts
Regular trailer maintenance helps prevent breakdowns, improves safety, and extends your trailer’s lifespan. By staying on top of common trailer problems, you’ll enjoy a smoother, safer towing experience with fewer unexpected issues.
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