Electrical faults can affect starting, lighting, charging or controls. Describe which function fails and whether the fault is constant or intermittent so the right inspection can be planned.
Useful clues include a failed window, lighting circuit, dashboard display or an intermittent starting issue. A clear description avoids treating every electrical symptom as a battery problem.
What can be completed at the vehicle depends on the condition and job. Any different arrangement should be discussed before work is agreed.