Mobile Truck & Trailer Electrical Repair

Lights out, a short you can't find, charging trouble, or an electrical gremlin that comes and goes? We trace it and fix it at your truck — 24/7, no tow.

Call (320) 429-7948Request Service

Truck & Trailer Electrical Repair that comes to your truck

Electrical problems are the most frustrating faults on a commercial truck because they hide. A light that works until you hit a bump, a battery that's dead every cold morning, a trailer circuit that drops out at the worst moment — these are tracing problems, and tracing is exactly what a mobile tech with the right meter does best.

We handle electrical diagnosis and repair on trucks and trailers across the I-94 corridor within about 100 miles of Alexandria, MN: lighting, wiring, batteries, charging systems, grounds, and connectors. We find the actual fault — not just the symptom — and repair it where the truck sits.

Truck & Trailer Electrical Repair — MTTR Mobile, Alexandria MN I-94 corridor

What's included

  • Full electrical diagnostics
  • Lighting repair (head, marker, trailer, brake lamps)
  • Wiring and connector repair
  • Battery, cable, and terminal service
  • Alternator and charging system repair
  • Ground and corrosion troubleshooting
  • 7-way and receptacle repair

Common problems we fix

Lights out
Wiring / short
Dead batteries
Charging fault
7-way / receptacle
Intermittent fault
MTTR Mobile technician performing truck & trailer electrical repair

Why electrical faults need a tech, not a tow

You can't tow your way out of an electrical problem — the truck arrives at the shop with the same hidden fault, plus a tow bill. Electrical work is about systematic tracing: load-testing the battery, checking voltage drop across connections, finding the corroded ground or chafed harness that's actually causing it.

A lighting defect is also a DOT out-of-service item waiting to happen. Getting it properly repaired on site — not just a bulb swapped over a bad circuit — keeps you legal and keeps the same fault from coming back next week. Trailer-side lighting and wiring overlap heavily with our trailer repair service.

Trailer lighting or wiring issue? See mobile trailer repair
FAQ

Electrical Repair questions

Yes — that's core mobile electrical work. We isolate the circuit, check voltage drop and grounds, and find the chafe, corrosion, or failed component causing the short rather than guessing at parts.
Intermittent lighting is almost always a connection problem: a corroded ground, a loose connector, or a harness rubbing through. We trace it to the actual cause and repair it so it stays fixed.
Yes — pigtails, receptacles, and the wiring on both the tractor and trailer side. If the trailer circuit is dead or unreliable, we test from the cab back and repair what we find.
We can. We load-test the batteries and check the charging system at your truck, so you know whether it's the batteries, the alternator, or a cable — and we replace what's actually failed.
Most lighting and battery calls are quick; tracing a buried harness fault can take longer. Call (320) 429-7948, describe what it's doing, and we'll give you a realistic picture before we start.

Related services

Trailer Repair
Diesel & Engine Repair
DOT Inspections
View all services

Where we serve

Fergus FallsAlexandriaOsakisSauk CentreMelroseAlbanyAvon
Available 24/7

Need electrical repair? Call now.

Tell us where you are and what it's doing — we'll give you a straight ETA and a mobile diesel tech.

Call (320) 429-7948