▸ RETAIL SERVICE
Electrical diagnostics
the dealer couldn’t replicate.
Spot-On performs advanced electrical diagnostics for vehicle owners at our San Antonio shop — the faults the dealer or local shop couldn’t isolate. CAN bus communication failures, parasitic battery drains, complex multi-module issues, and the work that ends with someone saying "we can’t replicate it." Manufacturer-grade scan tools, signal analysis, and the patience to chase a reproducible fault until it’s found.
▸ WHAT TO BRING US
The fault that doesn’t fit on one screen.
- CAN bus issuesMultiple unrelated modules showing communication errors.
- Parasitic battery drainBattery dies overnight or after a few days parked.
- Phantom symptomsHVAC behaving wrong, lighting glitches, accessory issues with no fault code.
▸ HOW WE WORK ELECTRICAL FAULTS
Reproducibility first.
Honest advice: please bring the vehicle in actively faulting. Diagnosis is billable time. Faults we can replicate at the bay are the only ones we can resolve cost-effectively.
- Note when it happensTemperature, drive cycle, time of day, what’s running, recent work performed elsewhere.
- Bring it in actively faultingIf the fault is happening when you arrive, we can chase it live — that’s the path to a real answer.
▸ READY TO BOOK
Book an in-shop appointment.
Tell us what the vehicle is doing and we’ll have the right tools ready before you arrive.