Semi & Truck Electrical Repair in Stockton, CA

American Truck & Trailer Repair diagnoses and repairs heavy-duty truck electrical systems in Stockton, California — starting and charging failures, wiring and shorts, sensors, lighting, and control-module issues on semis, trailers, and fleets.

Call (209) 663-6000 Request Service

What We Do

Heavy-duty truck electrical diagnosis and repair in Stockton — we trace the circuit to the real fault.

Starting systems — batteries, starters, and connections
Charging systems — alternators and voltage faults
Wiring, harnesses, grounds, and shorts
Sensors and control modules
Lighting — headlights, markers, and trailer lights
ABS and electrical fault-code diagnostics

Common Problems We See

No-start or slow crank
Batteries that keep dying or won't hold a charge
Intermittent shorts and blown fuses
Lights out or flickering
Sensor and module fault codes

Diagnose First, Then Fix

Electrical gremlins waste money when shops throw parts at them. We test the actual circuit, find the failure, and fix it once. Call (209) 663-6000 or request service online and tell us what the truck is doing.

Frequently Asked Questions

My truck won't start — is it electrical?

It can be a battery, starter, charging, or wiring problem. We test the whole starting and charging circuit to find the real cause instead of just replacing parts.

Can you find an intermittent short or wiring fault?

Yes. Tracing intermittent shorts, grounds, and harness faults is a core part of our diagnostic work — we follow the circuit to the actual failure.

Do you fix lighting and sensor problems?

Yes — headlights, marker and trailer lights, sensors, and control-module issues on heavy-duty trucks and trailers.

Get Your Truck Back on the Road

Call American Truck & Trailer Repair Inc. in Stockton, CA for fast, reliable heavy-duty service.

Call (209) 663-6000 Request Electrical Service