Trailer Safety Week 2026: HydraStar's Pre-Tow Inspection Checklist
The 60-Second Pre-Tow Checklist
01 · Coupler
Latched, locked, and seated on the ball. Safety chains crossed under the tongue.
02 · Lights
Brake lights, blinkers, running lights — both sides, every time. Plug seated.
03 · Tires
Cold PSI to sidewall spec. Look for sidewall cracks — trailer tires age out before they wear out.
04 · Brakes
Test the controller in the driveway. Trailer brakes should bite before truck brakes.
05 · Breakaway
Battery charged, pin seated, cable to the tow vehicle — never the safety chains.
06 · Load
10–15% tongue weight. Cargo strapped down. Under GVWR and GAWR per axle.
If any of these six fail — stop and fix it before you pull out of the driveway. The rest of this post breaks down what to look for under each one.
Why Trailer Safety Week Exists
Trailer Safety Week (TSW) is the annual national campaign run by the National Association of Trailer Manufacturers (NATM) to improve the safety of America's roadways through end-user, dealer, and manufacturer education. The 2026 dates are June 7–13, 2026.
HydraStar signed on as an official 2026 Ally because the campaign's mission lines up exactly with what our engineering and tech-support teams do every day: help trailer owners understand the systems they're depending on, before they're depending on them. Most of the calls and emails our team handles come down to one thing — somebody pulling out of the driveway with a question they could have answered the day before. That's what this week is for.
If you'd rather hear it straight from the source, NATM's free public webinar runs during TSW 2026. Anyone hauling for work, recreation, or a weekend move can sign up at trailersafetyweek.com.
Step 1 — Brakes (The HydraStar Specialty)
We build brake actuators and brake kits, so this is the section we get asked about most. Three checks — do them every haul.
| Check | What you're looking for | Red flag |
|---|---|---|
| Brake controller test | In the driveway at 5–10 mph, slide the controller manually. You should feel the trailer pull on the truck before the truck's own brakes engage. | No drag at all — or the truck nose-dives before you feel the trailer. |
| Fluid & lines (EOH only) | Reservoir at the fill line. No wet spots, drips, or weeping around fittings. Lines firm, not spongy. | Brown / dark fluid, low reservoir, fittings that weep when you wipe them. |
| Hot wheel after a tow | Touch each wheel hub after a short drive. All wheels should be similar — warm, not hot. | One hub significantly hotter than the rest — a sticking caliper, frozen wheel cylinder, or dragging shoe. |
If you have a 2024+ GM tow vehicle, the truck disables trailer brakes by default until our Controller Adapter Module is installed. If your trailer brakes have suddenly stopped working after a truck change, that's the first thing to check. See our GM Truck Brake Fix guide.
Step 2 — Axles, Hubs, and Bearings
Wheel bearings are the silent killer of trailer trips. A dry bearing can run 100 miles fine and seize on mile 101 — usually at highway speed, usually with a load on. Two things to do every haul:
Spin & listen
Before you hook up, jack one wheel at a time and spin it. You're listening for grinding, clicking, or a notchy feel through the tire. A healthy bearing spins silently and slows on its own.
Wiggle test
With the wheel still off the ground, grab it at 12 and 6 o'clock and rock it. Any meaningful play means a worn bearing or loose castle nut. Both get fixed before the next tow.
Annual service interval for standard hubs is roughly 12,000 miles or once a year, whichever comes first. Marine and saltwater rigs are more aggressive — inspect every season.
Step 3 — Tires
Trailer tires fail differently than car tires — they almost always age out before they wear out. A tire with 70% tread can be six years old and one pothole away from a sidewall blowout.
- Cold pressure to sidewall spec. Not the truck's PSI — the trailer tire's PSI, which is usually higher.
- Date code. The DOT code on the sidewall ends in a 4-digit number — week and year of manufacture (e.g., 3220 = week 32 of 2020). Anything older than 5–6 years gets replaced regardless of tread.
- Sidewall cracks. Hairline cracks running around the sidewall are dry rot. Tire is done.
- Match the load rating. ST-rated trailer tires only. P-rated passenger tires on a trailer are a failure waiting to happen.
Step 4 — Lights & Wiring
The two-minute version: hook up the trailer, walk around to each corner, have someone in the truck cycle the brakes, turn signals, and running lights. Confirm both sides on every function. Do this every time you tow — a corroded ground or a wiggled connector can disable a side at any moment.
If a function is dead on both sides, start at the trailer plug. If it's dead on just one side, start at that taillight's ground.
Step 5 — Coupler, Chains, Breakaway
- Coupler Fully seated on the ball, latch closed, safety pin or padlock through the latch hole. The classic mistake is a coupler resting on top of the ball but not closed around it — the truck lifts, the trailer doesn't.
- Chains Crossed under the tongue — that way the tongue lands in the “hammock” the chains form if the coupler ever fails, instead of dropping straight to the pavement.
- Breakaway Battery charged (test the switch with the truck disconnected — trailer brakes should clamp). Cable goes to the tow vehicle frame, not the safety chains — if the chains hold during a separation, the breakaway never trips.
Step 6 — Load & Weight
The three numbers that keep you legal and stable:
- GVWR (Gross Vehicle Weight Rating) — total of trailer + cargo. Don't exceed it. Ever.
- GAWR per axle (Gross Axle Weight Rating) — each axle has its own limit. A trailer can be under GVWR overall but overloaded on one axle if the cargo is biased forward or back.
- Tongue weight — the load on the hitch. 10–15% of total trailer weight for bumper-pull rigs. Too low and the trailer fishtails; too high and the truck rear-end squats and the front end gets light.
Pro move: CAT scales at most truck stops will weigh each axle for under $15. If you tow heavy or cross state lines regularly, weigh once at full load — you'll know exactly where you stand and you can re-stack to balance.
If Something Goes Wrong On The Road
Stop sooner, not later. Three signals worth pulling off the highway for:
Smell of hot brake / burning metal
Almost always a dragging brake or seized bearing. Pull off, walk each wheel, and touch the hub. The one that's too hot to keep your hand on is the one in trouble. Don't keep going.
Sudden sway or fishtail
Resist the urge to brake hard with the truck — that pushes the rear of the truck into the swaying trailer. Ease off the throttle, apply only the trailer brake via the controller's manual slide, and let the rig straighten out. Then pull over and rebalance the load.
Soft pedal or fading brakes on a grade
Heat-fade or air in the lines. Get off the grade, find a flat spot, let everything cool. If the pedal is still soft after cool-down, you have an EOH bleed or seal problem — don't continue down a mountain.
If This Walk-Through Surfaced a Problem
A few of our most-used product paths if the pre-tow inspection turned up something you need to replace before the next haul:
| What you found | Where to look |
|---|---|
| Weak / dead trailer brakes | EOH actuators · Find Your Brake Kit |
| Drum-to-disc upgrade | Disc Brake Kits (matches actuator PSI in the bundle) |
| Worn axles / hubs | Axles (spring & torsion) |
| Marine / saltwater service | Marine Components |
Trailer Safety Week — Quick FAQ
What is Trailer Safety Week?+
An annual national awareness campaign organized by the National Association of Trailer Manufacturers (NATM). 2026 dates are June 7–13. The mission is to reduce trailer-related incidents by educating end-users, dealers, and manufacturers on safe trailering practices. Full details at trailersafetyweek.com.
Is the NATM webinar free?+
Yes — free and open to the public. Designed for everyday trailer users, not industry pros. Practical, immediately applicable guidance whether you tow for work, recreation, or a one-time move. Register at the TSW site.
How often should I do this whole inspection?+
The 60-second checklist at the top — every time you hook up. The full walk-through — before the first tow of every season, and any time the trailer has been sitting for more than a month. Marine and saltwater rigs get the full walk-through more often.
What's the most common “preventable” trailer failure?+
Wheel bearings. By a long way. Bearings that haven't been re-packed in years are the cause behind a huge share of roadside trailer fires and seized hubs. The spin-and-listen / wiggle test takes 90 seconds and catches it before it strands you.
Where can I share this with my customers / club / fleet?+
Anywhere — that's the whole point of TSW. Direct link is the URL of this page. If you want NATM's official social graphics and shareable assets to pair with it, they're in the TSW Communications Kit.
