Semi Electrical, Starter & Battery Repair Jerome, Idaho
Need semi electrical, starter, or battery repair in Jerome, Idaho? A truck that clicks instead of cranks, lights that flicker, or a battery gauge that keeps dropping all point the same direction. The Semi Shop tests and fixes truck electrical systems in Jerome and at the roadside along I-84. Call (208) 696-9888.
What electrical work do you do?
We test and replace batteries, starters, and alternators, clean and repair cables and grounds, and chase down the harder stuff — shorts, corroded connectors, bad relays, blown fuse circuits, and lighting faults on both truck and trailer. Trailer light problems, marker lights that ghost on and off, and seven-way cord issues are everyday work here.
We handle all the makes running this corridor — Kenworth, Peterbilt, Freightliner, Western Star, Volvo, Mack, International — and the electrical side of Cummins, Detroit Diesel, PACCAR, and CAT engines, including starters and charging systems.
How long does electrical diagnosis take?
Batteries, starters, and alternators test fast — we usually know within the hour whether they're good, and swapping them is often same-day. Wiring gremlins take longer because we trace the circuit instead of guessing. We'll tell you up front which kind of problem you have. Either way, we quote before we repair, and the price we quote is the price you pay.
Can you jump-start or fix a no-start on the road?
Yes. Dead batteries and no-starts are among our most common mobile calls. We cover every I-84 exit from Bliss to Declo, 7 AM to 10 PM every day, with the flat call-out fee stated before we roll. On the roadside we can test the batteries and charging system, replace batteries or a starter, and get you moving — not just jump you and hope.
Cold mornings kill weak batteries
Every cold snap, the no-start calls stack up. A battery that cranked fine in October dies in a Wendell lot at 5 AM in January, because cold cuts a battery's cranking power hard while a cold diesel demands more of it. Corroded terminals and a lazy alternator make it worse.
If your truck lives outside through a Magic Valley winter — and most working trucks here do — have the batteries load-tested and the charging system checked before the freeze. It's a few minutes of testing against a morning of lost miles.
Driver questions
My truck just clicks when I turn the key. Battery or starter?
Could be either — or just a bad cable or ground. A single click often points to the starter; rapid clicking usually means weak batteries. We test before we replace anything, so you're not buying parts you don't need.
Do you replace batteries on the roadside?
Yes. We carry and install heavy-duty truck batteries on mobile calls anywhere on I-84 from Bliss to Declo. We test the charging system too, so the new batteries don't die the same way the old ones did.
Can you fix trailer lights?
Yes. Marker lights, brake lights, seven-way cords, and the wiring behind them, on dry vans, flatbeds, cattle pots, and dairy tankers. Lights are an easy roadside inspection violation — cheap to fix, expensive to ignore.
Shop bays in Jerome or mobile to any I-84 exit, Bliss to Declo · 7 AM–10 PM every day · The price we quote is the price you pay.