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🔌Electrical Diagnostics & Wiring Repair Beyond The Dealer
🧠 What Makes an Electrical Problem “Unsellable” for Most Shops?
When a shop says “you need a new computer” or “we can’t trace that short” that’s often the end of the road—for them. For us, it’s where the work starts.
From charging issues to no-start conditions, electrical diagnostics in Soddy-Daisy require more than a parts swap. At Keeney Auto & Diesel, testing is performed at the module level using factory schematics and specialized tooling—because most electrical failures don’t just throw a simple code.
Many general repair shops treat electrical issues as a guessing game. We don’t. Every test is controlled, verified, and repeatable. Whether it’s a CAN bus fault, parasitic draw, or no-crank/no-start scenario, we trace the actual failure—no guesses, no unnecessary parts.
Keeney Auto & Diesel specializes in diagnostics that go far beyond basic code scanning. From multiplexed CAN and LIN networks to complex fault tracing on classic trucks, this is where unsolved problems get handled.
➡️ Link to: Specialty Diagnostics Page
🔍 How Electrical Diagnostics Are Actually Done (When Done Right)
Electrical failures can’t be guessed at—they’re proven through scope captures, voltage drops, impedance tests, and precise interpretation.
This isn’t just scan tool work. This is logic-based troubleshooting with advanced tooling and experience behind every pin probe.
Whether the fault is buried in a harness, hidden inside a module, or caused by an aftermarket install, it gets documented and verified.
🚛 Classic Cars, Diesel Trucks, and Aftermarket Nightmares
Older trucks with hacked wiring?
Classic cars converted from points ignition to modern ECUs?
Diesel work trucks with years of fleet repairs and no known diagram?
Yes—those too.
If it has wires, a computer, or a failure that no one else has time to trace, this shop is built for it.
➡️ Link to:
📦Module Replacement Without Dealer Limitations
Need a BCM, PCM, or ABS module replaced—but the dealer says parts are discontinued?
Other shops don’t have programming access?
Here’s what you should know:
- Programming is done in-house, including J2534 coding and custom flashing
- BCMs and ECUs can be cloned or flashed offline using bench harnesses
- Remote secure flashing is available using licensed passthrough sessions
- EFILive is used for custom calibrations when OEM solutions don’t exist
- One-off OEM software is used when no other option is on the market
This isn’t dealership-level—it’s beyond it.
➡️ Link to: ECU & Module Programming
🧯Why We Charge More for “Simple” Work (and Why It’s Worth It)
This is not a fast-turn maintenance shop.
Oil changes are expensive here—because we don’t like doing them and don’t want to attract clients looking for the cheapest option.
Clients come here for certainty and problem-solving. That means slow work, validated results, and the kind of solutions that last.
➡️ Link to: Fluid & Maintenance
Symptoms That Often Point to Electrical Problems
- Vehicle cranks but won’t start
- Starts fine, then dies suddenly
- Multiple warning lights on at once
- Headlights flicker when using brakes
- Power windows or locks stop intermittently
- Dash lights dim while idling
- Battery dies overnight with no reason
- New alternator or battery, still not charging
- Scan tools show 'No Communication' from modules
🎯Results First, Tools Second
Yes, there’s advanced tooling on the bench.
But tools don’t fix cars—strategy does.
Every diagnostic session begins with a question, not a part. Every answer comes with proof.
If you're tired of guesses, swaps, or “we couldn’t replicate it,” then you're in the right place.
Whether it’s a modern CAN bus issue or a classic car with no spark, electrical issues don’t scare us—they’re what we’re built for.
If you’re stuck or no one else will touch it, you’re probably in the right place.
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The Impending Experience
Vehicles are one of the single largest investments most individuals will ever make in their lifetime. Typically, they are second in magnitude, only to the purchase of a home. When something goes awry with your second largest investment, a litany of emotions and eleventh-hour schedule alterations are inevitable. The only thing that could possibly make the entire ordeal worse, is subsequently realizing that the auto mechanic shop you've chosen to restore your vehicle to its previous, operational state, is one that lacks all ability to communicate clearly, provide accurate timelines, and fix it appropriately the first time around. The disdain I have for this type of environment is unparalleled and I will always point it out in derision. While my operation is small-scale, the processes I have in place are designed to directly address the aforementioned deficiencies we've all experienced in these shops.
Not unrelated to these deficiencies, the service and repair industry is hamstrung by the "Unattainable Triangle". When a shop fails the customer expectation, it is virtually always a result of delivering one of the fast sides of the triangle. I relay this information to shed light on the detriments of expeditious repairs. Here, in this business, speed is inconsequential. Automotive repairs made in haste are invariably inferior, whether you know it or not.