Diesel Electrical Diagnostics in Middle Tennessee
Advanced electrical troubleshooting for modern diesel engines and heavy equipment — CAN networks, sensors, charging systems, control modules and engine management.
Guessing is expensive. Diagnostics are not.
Wiring faults, sensor failures, CAN communication errors, ECM/PCM issues, and after-treatment problems all live in the electrical system. Replacing parts one at a time is the fastest way to spend a lot of money and still be broken down.
Our technicians use professional diagnostic software, oscilloscopes, digital multimeters, and factory wiring documentation to isolate faults down to the connector or component. That means less parts replacement and faster repairs.
We service engine management, emissions, transmission control, hydraulic control, telematics and body electrical systems across all major diesel platforms.
Modern diesel machines rely on layered electrical systems. A single failed sensor or corroded connector can shut down a $500,000 machine. Patriot HD uses OEM-level diagnostic software and testing equipment to find the actual fault fast.
Every make. Every model.
- Starting Systems
- Charging Systems
- CAN Networks
- Wiring Faults
- Sensors
- Control Modules
- Engine Management
- Emissions Systems
A complete field service.
- Electrical troubleshooting and repair
- Battery load testing and replacement
- Alternator and starter diagnostics
- Sensor and actuator testing
- Wiring harness repair
- Control module testing and programming
- CAN bus communication diagnostics
- Performance and driveability diagnostics
Why customers stay with Patriot HD
OEM-Level Software
Real diagnostic tools, not generic code readers.
Root-Cause Focus
We stop the guess-and-replace cycle.
Every Major Brand
CAT, Cummins, Detroit, Volvo, PACCAR and more.
On-Site Programming
Module flashes handled in the field.
Built on trust. Backed by results.
Veteran Owned
Integrity, discipline, and quality workmanship on every job.
Mobile Service
We come to your jobsite, fleet yard, farm, or facility.
Fast Response
24/7 emergency response to minimize costly downtime.
Middle Tennessee
Nashville, Franklin, Murfreesboro & every town between.
Frequently Asked Questions
In the words of our customers
"If you're in need of a heavy equipment mechanic, Austin with Patriot HD is the man you're looking for. Austin has all the traits I look for in a mechanic. He answers the phone when you call or gets back to you as soon as he can. He shows up on time, does exceptional work, and stands behind it."
"I'm out of Michigan and had to find somebody around Nashville to fix an old piece of rusty crap — a Moffett at our Nashville store. I called around to a few places and nobody called back except for Austin from Patriot. Talked to Austin — genuinely knows his stuff and got us running again."
"Austin was communicative, knowledgeable and timely. Fixed my skid steer and took the time to help me understand the problems it had. 5 star."
More field services
Mobile Diesel Repair
On-site diesel engine repair for trucks, fleets & diesel equipment across Middle Tennessee.
Heavy Equipment Repair
Mobile maintenance and repair for skid steers, excavators, dozers, wheel loaders and compact track loaders.
Hydraulic Repair & Troubleshooting
Cylinder, pump, hose and valve diagnostics — resolved at your jobsite.
Need it fixed today?
Talk to Austin directly. Most jobs are diagnosed on the same call.
Request Service
We'll respond fast.