Electrical & Computer Systems
Advanced Electrical Diagnostics for Trucks & Fleets
Stop Chasing Ghost Codes. We Pinpoint Complex Electrical Failures with Dealer-Level Tech.
From wiring harness repairs to complex ECU programming, we provide fast, accurate electrical troubleshooting that gets your fleet back on the job.
From wiring harness repairs to complex ECU programming, we provide fast, accurate electrical troubleshooting that gets your fleet back on the job.
Modern Trucks are Computers on Wheels.
A single corroded wire or a faulty ground can shut down an entire vehicle, trigger a dozen unrelated fault codes, and leave your best technicians scratching their heads. In the world of modern diesel, “guessing” is the most expensive way to repair an electrical problem.
OKC Fleet Services specializes in deep-system electrical diagnostics. Our team uses the latest oscilloscopes, multi-meters, and OEM-level software to see exactly what your truck’s computer is seeing. We don’t just swap parts—we find the break, the short, or the software glitch that is actually causing the failure.
OKC Fleet Services specializes in deep-system electrical diagnostics. Our team uses the latest oscilloscopes, multi-meters, and OEM-level software to see exactly what your truck’s computer is seeing. We don’t just swap parts—we find the break, the short, or the software glitch that is actually causing the failure.
Precision Electrical & Data Solutions
We handle everything from battery terminals to the most sensitive communication networks, providing complete electrical system service and repair for school buses and fleet vehicles.
Our technicians diagnose and repair wiring faults, power distribution issues, grounding problems, and control module malfunctions, while also servicing onboard communication and electronic systems.
Our technicians diagnose and repair wiring faults, power distribution issues, grounding problems, and control module malfunctions, while also servicing onboard communication and electronic systems.
CAN Bus & Network Diagnostics
If your modules aren’t “talking” to each other, the truck won’t move. We troubleshoot J1939 and CAN bus communication failures to restore data flow.
Computer & ECU Programming
We provide flashing, updating, and programming for Engine Control Units (ECU), Transmission Control Modules (TCM), and Body Controllers.
Wiring Harness Repair
Don’t replace a $3,000 harness for one broken wire. We perform high-quality, weather-sealed wiring repairs and pin replacements that meet OEM standards.
Starting & Charging Systems
Deep testing of heavy-duty alternators, starters, and battery banks. We ensure your fleet starts every time, even in the coldest Oklahoma winters.
Lighting & Safety Systems
Repair and troubleshooting for LED conversions, trailer wiring, strobe systems, and ABS lighting to keep you DOT compliant.
Sensor & Actuator Calibration
Precision testing of NOx sensors, pressure sensors, and throttle actuators. We ensure the “brain” of your truck is getting the right data.
Battery Management
Full-scale battery health audits and parasitic draw testing to find the “hidden” drain that’s killing your batteries overnight.
Aftermarket Accessory Wiring
Professional installation and troubleshooting for GPS tracking, ELD devices, and telematics to ensure they don’t interfere with OEM systems.
The OKC Fleet
Electrical Process
Full System Scan
We start by pulling all active and inactive codes across every module in the vehicle to see the “big picture.”
Voltage Drop & Continuity Testing
We go “hands-on” with the wiring, testing circuits under load to find hidden corrosion that a simple scan tool might miss.
Waveform Analysis
For intermittent issues, we use oscilloscopes to watch electrical signals in real-time, catching glitches that happen in milliseconds.
Targeted Repair
Once the failure point is identified, we perform a surgical repair—replacing only what is broken to save you time and money.
System Validation
We clear the “rabbit hole” of codes and perform a full drive cycle to ensure the repair is permanent and the system is stable.
Why Trust OKC Fleet
with Your Electronics?
OEM-Level Tooling
We invest in the same diagnostic software used by dealerships, allowing us to perform deep-level bi-directional testing.
Intermittent Issue Experts
We thrive on the “hard to find” problems that other shops give up on.
No Parts Cannon
We don’t just “replace and pray.” We prove the failure before we recommend the part.
Fast Turnaround
Electrical issues shouldn’t ground your fleet for weeks. We prioritize speed and accuracy.
Service Area
We serve diesel truck owners, fleet operators, and RV owners throughout the Oklahoma City metro area, including
4.9 out of 5 Stars on Google
Don’t just take our word for it — hear from fleet managers who trust us daily.
Best of OKC
2024, 2025 & 2026 Award Winner
NAPA Certified
Truck Care Center
FAQ for Electrical Computer System
Quick answers to common questions about our services and processes.
1
What kind of electrical issues can you troubleshoot?
We handle advanced electrical system diagnostics and repair on modern fleet trucks, including wiring issues, sensor faults, and electrical-related fault codes.
2
Can you diagnose intermittent electrical problems?
Yes. Our diagnostic process is designed to identify both consistent and intermittent electrical faults using proper diagnostic equipment and procedures.
3
Do you work on modern trucks with complex electrical systems?
Yes, we service the advanced electrical and sensor systems found in newer medium- and heavy-duty trucks.
4
What are common signs of an electrical issue?
Dashboard warning lights, dead batteries, flickering lights, malfunctioning gauges, or a truck that won’t start are common electrical symptoms.
5
How long does an electrical diagnostic take?
Like our other services, diagnostics are typically completed within one business day, with an estimate to follow within the next half day.
End the Electrical Headaches Today.
Deep diagnostics. Professional wiring. Guaranteed results.