01
No-start
“Clicks once and dies.” · “Cranks slow.” · “Dead by morning.”
Checked: voltage and connections, load and draw, starter response, alternator output.
Typically repaired at the roadside — boost first if that moves you, then the actual cause.
02
Battery, starting & charging
“Won't hold a charge.” · “New battery, same problem.”
Checked: battery condition, terminals and grounds, starter draw, charging output.
Typically repaired at the roadside — batteries, starters and alternators changed at the truck.
03
Truck & trailer electrical
“No lights on one side.” · “Blows the same fuse.” · “Gauges went dark.”
Checked: harness and grounds, fuses and relays, lighting circuits, power feeds.
Typically repaired at the roadside — tractor and trailer circuits traced on scene.
04
Air leaks & air system
“Hissing at the tanks.” · “Won't build air.” · “Drops overnight.”
Checked: lines and fittings, valves, leak isolation, build-up rate.
Typically repaired at the roadside — the leak is isolated and the system proven before you roll.
05
Brakes
“Brakes dragging.” · “Chamber blew.” · “Won't release.”
Checked: chambers and pots, slack and adjustment, air to the axle, what locked and why.
Roadside where feasible — heavier brake work is shop-scale, carried out where the truck is parked when the job allows.
06
Cooling & overheating
“Temp climbing on grades.” · “Coolant on the ground.”
Checked: leak source, hoses and clamps, coolant level and condition, fan operation.
Often repaired at the roadside — it depends what is leaking, and you get that answer at the truck.
07
Derate & DEF warnings
“Counting down to 5 MPH.” · “DEF light won't clear.”
Checked: codes read on scene, DEF system assessment, DPF and EGR service.
Assessed on scene — emissions service only. Emissions deletes are illegal and are never performed.
08
Trailer, lights & reefer
“No trailer lights.” · “Reefer threw a code.” · “No air to the box.”
Checked: trailer circuits and plug, lights, air to trailer, reefer faults.
Typically repaired at the roadside — the box gets fixed where it sits, tractor present or not.
09
Tire & wheel end
“Blew a steer.” · “Hub's hot.” · “Oil on the rim.”
Checked: tire condition, wheel seals, hub temperature and play.
Tires at the roadside — seals and hubs where conditions allow, with a straight answer either way.
10
Winter starting & fuel gelling
“Gelled up overnight.” · “Dies like it's starving.” · “Won't light off in the cold.”
Checked: gelling and filters, fuel supply, cold-start behaviour.
Typically repaired at the roadside — worked in the cold it happens in.