Electrical issues on a semi-truck or trailer can go from annoying to dangerous in seconds — especially when lights or ABS systems are involved. If you’re in the Treasure Valley and need dependable semi-truck wiring repair, you’ve got a few trusted options right here in Boise, ID.

Here’s a breakdown of reputable local shops that can help, along with a few tips to make sure the work gets done right the first time.

✅ Top Shops for Semi-Truck Wiring Repair in Boise, ID

1. Trebar Kenworth – Boise

📍 7500 S Eisenman Rd, Boise, ID 83716
📞 (208) 323-2300
trebartruck.com

Trebar is a long-standing Kenworth dealer with full electrical diagnostic capabilities. Their technicians are factory-trained, and they have a reputation for quick turnaround on trailer wiring and ABS repairs.

2. Western Trailer – Boise Service

📍 6701 S Supply Way, Boise, ID 83716
📞 (208) 336-8020
westerntrailer.com

Western Trailer offers full-service trailer repairs, including lighting and ABS diagnostics. They’re especially known for working on commercial fleets and do a solid job at chasing down intermittent shorts.

3. Rush Truck Centers – Boise

📍 9555 S Federal Way, Boise, ID 83716
📞 (208) 562-0700
rushtruckcenters.com

This national chain has a local Boise shop with 24/7 service availability. They handle tractor and trailer electrical issues, and their team uses modern diagnostic tools to speed up the repair process.

4. Idaho Wrench Works

📍 2480 S Vera Ave, Boise, ID 83709
📞 (208) 989-3359
idahowrenchworks.com

A smaller, locally owned shop specializing in mobile fleet services. They’ve built a name for fast electrical diagnostics and offer on-site trailer wiring inspections and repairs.

5. Utility Trailer Sales of Boise

📍 7350 S Eisenman Rd, Boise, ID 83716
📞 (208) 562-0700
utilitytrailerboise.com

Utility Trailer Sales works specifically with trailer fleets and stocks parts for ABS, wiring harnesses, and lighting. If your issue is trailer-side, they’re one of the most specialized providers in the city.

What to Ask Before You Choose a Shop

Not every electrical issue is just a burned-out light. Intermittent shorts, bad grounds, and ABS failures require more than just swapping parts. When you’re calling around, ask:

Do you test trailer circuits under load?
Do you use automated diagnostic tools (like Lite-Check’s Inspector 930)?
Can you provide fault codes and test reports after repairs?
Do you have parts in stock for common wiring repairs?

Shops that can answer "yes" to those questions are more likely to fix the problem the first time — and faster.

Why Tools Like the Inspector 930 Matter

Modern trailers have complex electrical systems — and problems often don’t show up until the trailer is powered and under load. Tools like the Inspector 930 allow shops to simulate road conditions, test circuits, and pull ABS fault codes without a tractor connected.

If a shop is using outdated methods (or just guessing), you may find yourself back in the same bay sooner than you'd like.

Final Tip: Don’t Wait for a DOT Violation

Lighting and ABS issues are some of the most common DOT violations. Don’t wait until you’re pulled over — find a shop that takes wiring seriously, uses modern tools, and doesn’t cut corners.

If your fleet is local to Boise and looking to bring diagnostics in-house, you can learn more about shop-grade testing tools here:
📍 lite-check.com/shop/inspector-930

Where to Get Semi-Truck Wiring Fixed in Boise, ID