Mobile Semi Trailer Repair — Brakes, Lights, Airlines & Gear
Trailer brakes, ABS and lighting faults, airlines, landing gear and door hardware — fixed at the yard or dockside.
Trailers get the least attention in most operations and cause an outsized share of the problems: lights that fail the night before a run, brakes out of adjustment at the scale, a landing gear crank that finally strips at the worst dock in Port Kells. Langley Mobile Truck Repair repairs trailers where they're parked — your yard, a customer's dock, or the roadside — across the Lower Mainland.
We service dry vans, reefers (trailer side), flatdecks, dumps, lowbeds, container chassis and utility trailers: air systems and foundation brakes, ABS faults, wiring and lighting, suspensions, landing gear, kingpins and door hardware. Trailer work pairs naturally with tractor PM — one visit, whole combination inspected and fixed.
What we handle on-site
- Trailer air brake repairs — chambers, valves, adjusters, airlines
- ABS fault diagnosis, sensors and wiring
- Lighting and wiring repairs — LEDs, harnesses, 7-way connectors
- Landing gear repair and replacement
- Trailer suspension — air bags, springs, bushings, torque arms
- Wheel seals, bearings and hub service
- Door hardware, hinges and roll-up door repairs
- Kingpin, upper coupler and container-chassis inspection
Keep the whole combination legal
BC's inspection program covers commercial trailers too, and trailer defects — lights, brake adjustment, oil-soaked linings — are among the most common reasons combinations get flagged at scales. A trailer that sits between uses corrodes quietly: wiring, air fittings and brake components age even when the odometer doesn't move. We fix what's failed and flag what's failing, in writing, so nothing at the scale surprises you.
Fleets with mixed trailer pools: ask about adding trailers to a scheduled maintenance rotation — it's the difference between finding a dead ABS sensor in your yard versus at a roadside inspection with a load on.
Related services
Book a mechanic — by text
Fastest: the wizard builds a clean dispatch text with your issue, truck and location, and copies you on it.
Start the 60-second bookingOr text us directly:
Prefer voice? Call the same number. 24/7 emergency roadside + scheduled maintenance by appointment.
- $130/hour — around the clock
- Zero markup on parts (receipts included)
- No call-out fee, no zone fees
- Estimate our travel time
Trailer Repair — FAQs
Who should I call if my trailer will not take air at a Lower Mainland dock?
Text Langley Mobile Truck Repair on 778-887-5216. A trailer that will not charge cannot be moved, so it is mobile work by definition and we come to the dock. We cover Port Kells, Campbell Heights, Delta, Surrey, Langley and Abbotsford 24 hours, and we carry airline, gladhands, relay and spring brake valves so most calls finish in a single visit at $130/hour. Tell us what the tractor gauges read and whether the trailer has been sitting in the cold, because ice in the supply line is the most common cause here from November onward.
My trailer is not getting air. What is wrong?
Start at the connection: gladhands seated properly and not crossed, and the supply line not kinked or split. Then look at the tractor: if it is not holding above the spring brake trip point, the trailer will never charge. After that it is usually a failed relay or spring brake valve on the trailer, a leaking airline along the frame, or ice in the line, which is common here from November. We carry airline, gladhands and valves, so this is normally a single visit.
My reefer unit will not start. Can you help?
Straight answer on scope. We will come out, check the things that stop a reefer starting for non-refrigeration reasons: fuel level and fuel supply, a flat or failing battery, corroded terminals and grounds, blown fuses, and a unit that has run dry and needs priming. Thermo King and Carrier units that fault on the refrigeration side, compressor, or control board are specialist work and belong with a reefer shop. We will tell you which one you are looking at rather than bill you to find out, and getting a load moving matters more than pretending otherwise.
My trailer lights are out and I run tonight. Can you come?
That's a classic evening call and usually very fixable — most trailer lighting faults are the 7-way, a ground, or a harness section, all repairable on site. Text 778-887-5216 with the trailer's location and what's dead (all lights? one side? markers?), and we'll get you legal before your window.
Do you repair trailer ABS faults?
Yes — sensor gaps, damaged sensor wiring, corroded connectors and power supply problems at the 7-way are the usual suspects, and all of them are yard-fixable. We diagnose with proper tooling rather than parts-cannoning, and the ABS lamp is proven out before we leave.
Can you fix landing gear on a loaded trailer?
Often yes, with appropriate support — stripped cranks, seized legs and failed gearboxes are common calls. If the trailer is loaded and the gear has structurally failed, safety comes first: we'll assess on site and be straight with you about what's workable and what needs the load moved.
We have trailers parked all over the Lower Mainland. Do you travel between them?
Yes — multi-stop service runs are normal for us, and the yard density from Langley through Port Kells to Annacis makes them efficient. Send the list by text and we'll sequence the stops sensibly; you're billed for time, and the travel-time tool gives you a feel for the driving legs between yards.
Truck down? Text us your location.
A real dispatcher replies fast — you and dispatch both get the booking by text. 24/7 emergency roadside + scheduled maintenance by appointment.