Advanced Auto Electrical Diagnostics & Repair in Carbondale, CO

From dead batteries to warning light mysteries, electrical issues can grind your day, and your truck, to a stop. At JW Diesel & Automotive, we get you back in gear with precise diagnostics, high-integrity repairs, and a team that treats your vehicle like it’s their own. Honest service, diesel-smart techs, and solutions you can trust to go the distance.

Power, Safety, Control:
It All Depends on Your Electrical System

Your vehicle’s electrical system does more than start the engine. It runs the lights that keep you visible, the modules that control safety features, and the electronics that help your truck perform under load. Faulty wiring, worn sensors, or a weak battery can create frustrating issues, or serious risks, if left unaddressed. Whether you’re hauling up a mountain pass or heading out on a long haul, you need a system that’s dialed in, dependable, and safe.

Notice Something Off? Here’s What That Could Mean

If your vehicle shows any of the following symptoms, bring it in for a full electrical inspection:

Intermittent no-start or slow cranking
Flickering or dim headlights
Dash lights or gauges acting erratically
Power windows, locks, or mirrors not responding
Battery drain or constant jump-starting
Strange smells or signs of melted wiring
Electrical accessories failing without warning

Our team specializes in finding the source, not just the symptom, so you don’t waste time or money on guesswork.

Our Comprehensive Auto Electrical Services

We offer full-service diagnostics and repair for modern automotive electrical systems, using OEM-level tools and equipment designed for accuracy and efficiency. Our ASE and Ford-certified technicians bring years of hands-on experience to every job, diesel or gas.

Electrical System Diagnostics

Using dealer-level scan tools and live data tracking, we perform thorough diagnostics across your entire electrical network, from starting systems to sensor communication. Our process includes parasitic draw testing, voltage drop analysis, and module scanning for pinpoint precision and quicker turnaround times.

Battery Testing & Replacement

We test your battery’s health, including voltage, cold-cranking amps, and internal resistance. If it’s not up to the task, we’ll install a high-quality replacement that’s built to match your vehicle’s electrical load, usage, and environment for reliable starting power.

Alternator & Starter Repair

Struggling to start? Experiencing power loss? We test and service alternators, starters, solenoids, and related circuits to restore proper charging and starting, so your truck performs when it counts, whether on the job or the open road.

Wiring & Connector Repairs

Damaged, frayed, or corroded wiring is one of the most common causes of elusive electrical issues. We trace, repair, and replace compromised wires, connectors, and terminals to restore proper function and prevent future failures.

Fuse, Relay & Sensor Replacement

Blown fuses, failed relays, or malfunctioning sensors can knock out critical systems, like ignition, HVAC, and lights. We inspect and replace the affected components with precision, getting your systems back online without overdoing the repair.

Power Accessories: Windows, Locks, Mirrors, Lighting

From worn-out window regulators to dimming headlights, we repair the full range of powered components in your vehicle. Our service restores comfort, visibility, and function, ensuring you’re safe and in control.

Module Programming & Component Replacement

Modern trucks rely on interconnected electronic modules, from body control modules (BCMs) to transmission control units (TCUs). We replace and program these components to manufacturer specifications, ensuring seamless integration and reliable operation.

The Western Slope’s Go-To Electrical Experts

Choosing an auto repair shop for electrical issues means trusting someone to get to the root of the problem, and that’s where we deliver.

Certified Expertise, Diesel Know-How

Our ASE- and Ford-certified technicians are trained in both general electrical systems and the specialized needs of diesel trucks.

Dealer-Level Tools, Small-Town Integrity

We use OEM-grade diagnostics and software without the dealership pricing or upsell pressure, just honest answers and real solutions.

Transparent, No-Upsell Service

We explain exactly what’s wrong and how we’ll fix it. No inflated bills, or unnecessary repairs, just repairs you can trust.

Community-Driven, Warranty-Backed

Proud to support local teams and events, we stand behind every electrical repair with a 12-month/12,000-mile warranty.

Easy Drop-Offs, Fleet-Friendly

No appointment needed, drop your vehicle off anytime during business hours. We prioritize fast, efficient service for all our customers.

Backed by Warranty

We stand behind our work with a 12-month / 12,000-mile warranty on parts and labor.

JW Diesel & Automotive

Diesel strong. Fleet ready. Driven to be the best.

Power Up with Repairs You Can Rely On

When your vehicle’s electrical system falters, you need answers. At JW Diesel & Automotive, we don’t just repair, we restore reliability and trust, mile after mile.

Visit us at 794 Industry Place, Carbondale, CO 81623 or text (970) 510-6344 to get started. Prefer a call? Reach us at (970) 510-5157. Proudly serving drivers from Carbondale to Glenwood Springs, Aspen, Eagle, New Castle, Grand Junction, and across Colorado’s Western Slope.

Driven to be the best.