Safe hitching guide: connecting and loading your trailer

Published August 14, 2026 · 8 min read

Hitching a trailer is not difficult. What makes it risky is that most people do it once a year, in a hurry, in a parking lot, with someone waiting. This article is the full sequence, in the order you actually do it, with the spots where people get it wrong.

Four numbers to know before you leave home

Write them down before you even book. They fit on a scrap of paper and they head off 90 % of problems.

• Your vehicle’s towing capacity, from the owner’s manual. That is the only source that counts, not a forum and not a guess.
• Your ball diameter: 1 7/8, 2 or 2 5/16 inches. It is stamped on the ball itself.
• Your electrical connector: 4-pin (flat) or 7-pin (round).
• Do you have a brake controller? It is the small box under the dash. Without it, a trailer with electric brakes has no brakes.

Every page in our catalogue lists the ball, the connector, whether the trailer has electric brakes, its empty weight and its load capacity. Compare the two lists before booking.

The ball and the coupler

The trailer’s coupler and the vehicle’s ball must be exactly the same diameter. A 2-inch ball under a 2 5/16-inch coupler seems to hold: it will come off at the first bump. This is the most dangerous mistake on the whole list, and it is invisible once the coupler is closed.

The sequence:

1. Back up until the coupler sits over the ball.
2. Lower the jack until the coupler is fully seated on the ball. Not halfway: fully.
3. Close the coupler latch, then insert the safety pin.
4. Raise the jack all the way and fold it up. A jack left low catches on driveway aprons and speed bumps.
5. The test that does not lie: with the jack still bearing down, try to lift the hitch. If the trailer lifts the back of the vehicle with it, it is locked. If the coupler separates from the ball, start again.

Safety chains

They cross in an X under the tongue, then hook to the vehicle’s anchor points. The crossing is not decorative: if the coupler lets go, the X forms a cradle that holds the tongue up instead of letting it dig into the asphalt.

Leave just enough slack to turn fully without the chains pulling, but not enough for them to touch the ground. A chain that drags wears through, and it breaks on the day you need it.

The connector and the lights

Plug in the connector, then walk around and check all four functions, someone in the vehicle and you at the back:

• running lights
• brake lights
• left turn signal
• right turn signal

Thirty seconds. A dead brake light on a 20-foot trailer, at night, is an invisible trailer to the car behind you.

The connector cable must run over the chains, never under, and keep enough length to turn without unplugging.

Electric brakes and the controller

The heaviest trailers in our fleet, including the dump trailers, have electric brakes. They need two things: a 7-pin connector and a brake controller fitted in the tow vehicle.

Set the controller gain at your first stop, in an empty lot: brake gently at low speed. If the trailer pushes the vehicle, raise the gain. If the trailer wheels lock, lower it. The setting changes with the load, so redo it once you are loaded.

Weight distribution: the part that matters most

If you take one thing from this article, take this one. Almost every case of highway sway comes from a badly placed load, not from too much weight.

The working rule: roughly 60 % of the weight ahead of the axle, 40 % behind. That puts weight on the tongue, therefore on the hitch, and that tongue weight is what keeps the combination stable.

• Too much weight at the back: the trailer starts swinging side to side, the oscillation feeds itself, and it becomes very hard to recover.
• Too much weight at the front: the back of the vehicle squats, the front goes light, the steering turns vague and the headlights blind oncoming traffic.

So load the heaviest items first, just ahead of the axle and centred across the width. Light bulky items go around and on top. And if it does start to sway: do not brake hard and do not steer out of it. Ease off the throttle, hold the wheel straight, let it slow down.

Strapping the load

On a flatbed, nothing holds the load but your straps. On an enclosed trailer the walls stop things leaving but not moving, and a load that shifts under braking changes the balance at the worst possible moment.

• Use the trailer’s anchor points: D-rings, E-Track rails, fixed straps depending on the model. Never the side rails.
• Strap down and outward, not just forward. A load has to be stopped from moving in all four directions.
• Protect sharp edges with a scrap of carpet or cardboard: a strap rubbing on cut metal saws through in a few kilometres.
• Re-check after the first 20 kilometres. Straps always loosen a little at the start, and loads settle. It is the most useful stop of the trip.

The 60-second final check

Before you pull out of the lot, walk around:

1. Coupler seated on the ball, latch closed, pin in
2. Chains crossed in an X, not touching the ground
3. Connector plugged in, cable over the chains
4. All four lighting functions tested
5. Jack raised and folded
6. Load strapped, nothing loose
7. Door or tailgate latched
8. Trailer tyres inflated, no visible cuts
9. Licence plate visible and lit

On the road, what changes

• Braking takes much longer. Double your following distance, at minimum.
• Turns need a wider line. The trailer cuts inside the vehicle’s path; aim wider than usual at corners and driveways.
• Reversing is small movements. One hand at the bottom of the wheel: move your hand the way you want the trailer to go. Correct early and little, rather than late and a lot.
• Crosswinds and passing trucks move an enclosed trailer far more than a flatbed. Hold firm as they go by.

For the legal side (registration, licence class, equipment required by the Highway Safety Code), see our article on trailer licensing and registration in Quebec. And if you are not sure your vehicle suits the trailer you have in mind, call us before you book: it is quicker to sort out on the phone than at the counter.